chore: update PR template

Author: olimorris

.github/pull_request_template.md

@@ -1,6 +1,21 @@
+<!-- Please do not alter the structure of this PR template -->
+
 ## Description
 
-<!-- If this is a feature request, please describe how it will benefit other CodeCompanion users -->
+<!--
+  Please provide a clear and concise description of your changes.
+
+  - What does this PR do?
+  - Why is this change needed?
+  - If this is a feature request, describe how it will benefit other CodeCompanion users.
+-->
+
+## AI Usage
+
+<!--
+  CodeCompanion actively encourages PRs and the use of CodeCompanion to help write them.
+  If you used AI assistance to help with this PR, please briefly describe how you used it and the models you used.
+-->
 
 ## Related Issue(s)
 
@@ -16,6 +31,6 @@
 ## Checklist
 
 - [ ] I've read the [contributing](https://github.com/olimorris/codecompanion.nvim/blob/main/CONTRIBUTING.md) guidelines and have adhered to them in this PR
-- [ ] I've run `make all` to ensure docs are generated, tests pass and [StyLua](https://github.com/JohnnyMorganz/StyLua) has formatted my code
+- [ ] I've run `make all` to ensure docs are generated, tests pass and [StyLua](https://github.com/JohnnyMorganz/StyLua) has formatted the code
 - [ ] _(optional)_ I've added [test](https://github.com/olimorris/codecompanion.nvim/blob/main/CONTRIBUTING.md#testing) coverage for this fix/feature
 - [ ] _(optional)_ I've updated the README and/or relevant docs pages