Add AI acknowledgement checkbox and welcome comment

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,6 +2,7 @@
 
  - [ ] Closes #xxxx
  - [ ] I am familiar with the [contributing guidelines](https://pvlib-python.readthedocs.io/en/latest/contributing/index.html)
+ - [ ] I attest that all AI-generated material has been vetted for accuracy and is in compliance with the pvlib license
  - [ ] Tests added
  - [ ] Updates entries in [`docs/sphinx/source/reference`](https://github.com/pvlib/pvlib-python/blob/main/docs/sphinx/source/reference) for API changes.
  - [ ] Adds description and name entries in the appropriate "what's new" file in [`docs/sphinx/source/whatsnew`](https://github.com/pvlib/pvlib-python/tree/main/docs/sphinx/source/whatsnew) for all changes. Includes link to the GitHub Issue with `` :issue:`num` `` or this Pull Request with `` :pull:`num` ``. Includes contributor name and/or GitHub username (link with `` :ghuser:`user` ``).

.github/workflows/welcome.yml

@@ -0,0 +1,23 @@
+name: Welcome First-Time Contributor
+
+on:
+  pull_request_target:
+    types: opened
+
+jobs:
+  welcome:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: plbstl/first-contribution@v4
+        with:
+          pr-opened-msg: |
+            ### Hey @{fc-author}! :tada:
+
+            Thanks for opening your first pull request! We appreciate your
+            contribution. Please ensure you have reviewed and understood the
+            [contributing guidelines](https://pvlib-python.readthedocs.io/en/latest/contributing/index.html).
+
+            If AI is used for any portion of this PR, you must vet the content
+            for technical accuracy.

docs/sphinx/source/whatsnew/v0.15.1.rst

@@ -33,6 +33,9 @@ Documentation
     - :term:`aod500`
 
 * Provide an overview of IAM modeling functionality in :ref:`iam`. (:pull:`2683`)
+* Add AI checkbox to PR template, and auto-generate a comment on issues and PRs
+  from first-time contributors regarding AI and contributing guidelines.
+  (:issue:`2617`, :pull:`2624`)
 
 
 Testing