docs: Replace JIRA with GitHub Issues (#3303)

And some general cleanup.

Author: Fokko

README.md

@@ -68,8 +68,7 @@ LC_ALL=C ./mvnw clean install
 
 ## Features
 
-Parquet is a very active project, and new features are being added quickly. Here are a few features:
-
+Parquet is an active project, and new features are being added quickly. Here are a few features:
 
 * Type-specific encoding
 * Hive integration (deprecated)
@@ -96,7 +95,9 @@ Parquet is a very active project, and new features are being added quickly. Here
 
 ## Java Vector API support
 `The feature is experimental and is currently not part of the parquet distribution`.
+
 Parquet-Java has supported Java Vector API to speed up reading, to enable this feature:
+
 * Java 17+, 64-bit
 * Requiring the CPU to support instruction sets:
   * avx512vbmi
@@ -116,26 +117,29 @@ Note that to use an Input or Output format, you need to implement a WriteSupport
 We've implemented this for 2 popular data formats to provide a clean migration path as well:
 
 ### Thrift
+
 Thrift integration is provided by the [parquet-thrift](https://github.com/apache/parquet-java/tree/master/parquet-thrift) sub-project.
 
 ### Avro
+
 Avro conversion is implemented via the [parquet-avro](https://github.com/apache/parquet-java/tree/master/parquet-avro) sub-project.
 
 ### Protobuf
+
 Protobuf conversion is implemented via the [parquet-protobuf](https://github.com/apache/parquet-java/tree/master/parquet-protobuf) sub-project.
 
 ### Create your own objects
+
 * The ParquetOutputFormat can be provided a WriteSupport to write your own objects to an event based RecordConsumer.
 * The ParquetInputFormat can be provided a ReadSupport to materialize your own objects by implementing a RecordMaterializer
 
 See the APIs:
+
 * [Record conversion API](https://github.com/apache/parquet-java/tree/master/parquet-column/src/main/java/org/apache/parquet/io/api)
 * [Hadoop API](https://github.com/apache/parquet-java/tree/master/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/api)
 
 ## Hive integration
 
-Hive integration is provided via the [parquet-hive](https://github.com/apache/parquet-java/tree/master/parquet-hive) sub-project.
-
 Hive integration is now deprecated within the Parquet project. It is now maintained by Apache Hive.
 
 ## Build
@@ -178,22 +182,22 @@ The current release is version `1.15.1`.
 
 ### How To Contribute
 
-We prefer to receive contributions in the form of GitHub pull requests. Please send pull requests against the [parquet-java](https://github.com/apache/parquet-java) Git repository. If you've previously forked Parquet from its old location, you will need to add a remote or update your origin remote to https://github.com/apache/parquet-java.git
+We prefer to receive contributions in the form of GitHub pull requests. Please send pull requests against the [parquet-java](https://github.com/apache/parquet-java) Git repository. If you've previously forked Parquet from its old location, you will need to add a remote or update your origin remote to `https://github.com/apache/parquet-java.git`.
 
-If you are looking for some ideas on what to contribute, check out jira issues for this project labeled ["pick-me-up"](https://issues.apache.org/jira/browse/PARQUET-5?jql=project%20%3D%20PARQUET%20and%20labels%20%3D%20pick-me-up%20and%20status%20%3D%20open).
-Comment on the issue and/or contact [dev@parquet.apache.org](http://mail-archives.apache.org/mod_mbox/parquet-dev/) with your questions and ideas.
+If you are looking for some ideas on what to contribute, check out [GitHub issues](https://github.com/apache/parquet-java/issues) for labeled [Good first issue](https://github.com/apache/parquet-java/issues?q=state%3Aopen%20label%3A%22Good%20first%20issue%22). Comment on the issue and/or contact [dev@parquet.apache.org](https://lists.apache.org/list.html?dev@parquet.apache.org) with your questions and ideas.
 
-If you’d like to report a bug but don’t have time to fix it, you can still post it to our [issue tracker](https://issues.apache.org/jira/browse/PARQUET), or email the mailing list [dev@parquet.apache.org](http://mail-archives.apache.org/mod_mbox/parquet-dev/)
+If you’d like to report a bug but don’t have time to fix it, you can still raise an [issue on GitHub](https://github.com/apache/parquet-java/issues/new/choose), or email the mailing list [dev@parquet.apache.org](https://lists.apache.org/list.html?dev@parquet.apache.org).
 
 To contribute a patch:
 
   1. Break your work into small, single-purpose patches if possible. It’s much harder to merge in a large change with a lot of disjoint features.
-  2. Create a JIRA for your patch on the [Parquet Project JIRA](https://issues.apache.org/jira/browse/PARQUET).
-  3. Submit the patch as a GitHub pull request against the master branch. For a tutorial, see the GitHub guides on forking a repo and sending a pull request. Prefix your pull request name with the JIRA name (ex: https://github.com/apache/parquet-java/pull/240).
+  2. Create an issue for your patch on the [GitHub issues](https://github.com/apache/parquet-java/issues).
+  3. Submit the patch as a GitHub pull request against the master branch. For a tutorial, see the GitHub guides on forking a repo and sending a pull request. Prefix your pull request name with the issue (ex: https://github.com/apache/parquet-java/pull/3260).
   4. Make sure that your code passes the unit tests. You can run the tests with `./mvnw test` in the root directory.
   5. Add new unit tests for your code.
 
 We tend to do fairly close readings of pull requests, and you may get a lot of comments. Some common issues that are not code structure related, but still important:
+
   * Use 2 spaces for whitespace. Not tabs, not 4 spaces. The number of the spacing shall be 2.
   * Give your operators some room. Not `a+b` but `a + b` and not `foo(int a,int b)` but `foo(int a, int b)`.
   * Generally speaking, stick to the [Sun Java Code Conventions](http://www.oracle.com/technetwork/java/javase/documentation/codeconvtoc-136057.html)
@@ -204,18 +208,20 @@ Thank you for getting involved!
 ## Authors and contributors
 
 * [Contributors](https://github.com/apache/parquet-java/graphs/contributors)
-* [Committers](dev/COMMITTERS.md)
+* [Committers](https://projects.apache.org/committee.html?parquet)
 
 ## Code of Conduct
 
 We hold ourselves and the Parquet developer community to two codes of conduct:
+
   1. [The Apache Software Foundation Code of Conduct](https://www.apache.org/foundation/policies/conduct.html)
   2. [The Twitter OSS Code of Conduct](https://github.com/twitter/code-of-conduct/blob/master/code-of-conduct.md)
 
 ## Discussions
-* Mailing list: [dev@parquet.apache.org](http://mail-archives.apache.org/mod_mbox/parquet-dev/)
-* Bug tracker: [jira](https://issues.apache.org/jira/browse/PARQUET)
-* Discussions also take place in github pull requests
+
+* Mailing list: [dev@parquet.apache.org](https://lists.apache.org/list.html?dev@parquet.apache.org)
+* GitHub issues: [Issues](https://github.com/apache/parquet-java/issues)
+* Discussions also take place in GitHub pull requests
 
 ## License