Factor out reactExamples module from previous demo module (#157)

* migrate react examples / pages from tutorialModules/demo to new reactExamples module
* update misc references to previous "demo" module name
* switch from enzyme to react testing library

Author: cnathe

.gitignore

@@ -1,4 +1,8 @@
 # generated artifacts
+reactExamples/node_modules
+reactExamples/resources/web/gen
+reactExamples/resources/web/reactExamples/gen
+reactExamples/resources/views/gen
 dependencies.txt
 jars.txt
 enlistment.properties

reactExamples/.npmrc

@@ -0,0 +1,2 @@
+# Set registry for @labkey scopes
+@labkey:registry=https://labkey.jfrog.io/artifactory/api/npm/libs-client/

reactExamples/README.md

@@ -0,0 +1,56 @@
+# Summary
+This is a demo LabKey ReactJS module. This module demonstrates how to render a React application/page within the LabKey framework
+including keeping the standard LabKey header and header menus.
+
+<a name="gettingStarted"></a>
+# Getting Started
+Clone the tutorialModules repo into `/server/modules` directory and add the directory in `settings.gradle`.  You can then build this module
+using the [LabKey Gradle build]. This will install necessary packages, generate resources and put resources in the correct LabKey module's directories.
+
+The reactExamples module includes the following example React pages:
+- http://localhost:8080/labkey/home/reactExamples-helloWorld.view
+- http://localhost:8080/labkey/home/reactExamples-queryModel.view
+- http://localhost:8080/labkey/home/reactExamples-todoList.view
+- http://localhost:8080/labkey/home/reactExamples-fileAttachmentForm.view
+
+Also, this module has an example of using the todoList page in a LabKey webpart.
+
+One of the example React pages, `reactExamples-queryModel.view`, has example usages of components from
+the LabKey React shared component library, `@labkey/components`. You can see more details and
+documentation regarding these shared components from the [Public API doc] page.
+
+<a name="functionality"></a>
+# Functionality Overview
+The compilation and packaging of this module, including the NPM/webpack build, is done with the standard LabKey Gradle build.
+Gradle will use the Node and NPM version defined in `\<projectHome\>/gradle.properties` to run the `build` script defined in `package.json`.
+Note: Gradle does not install Node/NPM globally. To run NPM commands outside of Gradle you will need to have Node/NPM installed
+locally. For more information on what `scripts` the LabKey Gradle build expects from the module `package.json` file,
+see the [Node.js Build Dependency] documentation page.
+
+The webpack build will compile TypeScript and JavaScript files, as well as CSS and SCSS files, and bundle them independently
+for each module entry point. See the example at `reactExamples/src/client/entryPoints.js`.  The bundled resources will be placed in the
+appropriate LabKey directory for web resources. See the example at `resources/web/gen/`.  The build will also
+generate the necessary LabKey HTML files, including the containing elements for the React apps, as well as the necessary
+`view.xml` files to make the bundled React and CSS files available to the appropriate LabKey React pages.
+See the example at `resources/views/`.
+
+<a name="devServer"></a>
+## Development Server
+This module includes a webpack development server to help with rapid development.  The server is setup for Hot Module Replacement,
+to allow updates made to TypeScript, JavaScript, CSS and SCSS files to take effect on the page without manual builds or page refreshes. To
+start the server, from the command line in the reactExamples module directory run `npm start`, then navigate to either of the appropriate development
+pages (note the "Dev" added to the end of the action name).
+- http://localhost:8080/labkey/home/reactExamples-helloWorldDev.view
+- http://localhost:8080/labkey/home/reactExamples-queryModelDev.view
+- http://localhost:8080/labkey/home/reactExamples-todoListDev.view
+- http://localhost:8080/labkey/home/reactExamples-fileAttachmentFormDev.view
+
+<a name="jest"></a>
+## Jest Tests
+This module is setup to run Jest tests, including using Enzyme and Jest Snapshot testing. There is an example Jest test and
+Jest snapshot in the HelloWorld module.  Jest tests can be run using `npm run test` or they can be run directly in IntelliJ.
+
+
+[LabKey Gradle build]: https://www.labkey.org/Documentation/wiki-page.view?name=gradleBuild
+[Node.js Build Dependency]: https://www.labkey.org/Documentation/wiki-page.view?name=nodejs
+[Public API doc]: https://github.com/LabKey/labkey-ui-components/blob/master/packages/components/docs/public.md 

reactExamples/build.gradle

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+plugins {
+    id 'org.labkey.build.fileModule'
+}

reactExamples/module.properties

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+ModuleClass: org.labkey.api.module.SimpleModule