[META] AI policy (#7914)

* Add `CONTRIBUTING.md` and link it in the readme

* Add TBD PR template

* Merge `DEVELOPMENT.md` -> `CONTRIBUTING.md`

* Revise `PULL_REQUEST_TEMPLATE.md`

* Have checkboxes

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,10 @@
+<!--
+Thanks for your contribution!
+-->
+
+- [ ] Closes #xxxx <!-- Replace xxxx with the GitHub issue number -->
+- [ ] This PR follows our [AI policy](https://github.com/RustPython/.github/blob/main/AI_POLICY.md)
+
+## Summary
+<!-- What's the purpose of the change? What does it do, and why? -->
+

CONTRIBUTING.md

@@ -1,4 +1,28 @@
-# RustPython Development Guide and Tips
+# Contributing to RustPython
+
+Contributions are more than welcome, and in many cases we are happy to guide
+contributors through PRs or on [**Discord**](https://discord.gg/vru8NypEhv).
+
+## Finding ways to help
+
+We label issues that would be good for a first time contributor as [`good first issue`](https://github.com/RustPython/RustPython/issues?q=label%3A%22good+first+issue%22+is%3Aissue+is%3Aopen+).
+Also checkout the [issue tracker](https://github.com/RustPython/RustPython/issues) for all open issues. 
+
+You can enhance CPython compatibility by increasing our unittest coverage, you can see [This pinned issue](https://github.com/RustPython/RustPython/issues/6839) to see which libs and tests need be updated to our current supported python version.
+
+Another approach is to checkout the source code: builtin functions and object
+methods are often the simplest and easiest way to contribute.
+
+You can also simply run `python -I scripts/whats_left.py` to assist in finding any unimplemented method.
+
+## Use of AI
+
+We **require all use of AI in contributions to follow our
+[AI Policy](https://github.com/RustPython/.github/blob/main/AI_POLICY.md)**.
+
+If your contribution does not follow the policy, it will be closed.
+
+## RustPython Development Guide and Tips
 
 RustPython attracts developers with interest and experience in Rust, Python,
 or WebAssembly. Whether you are familiar with Rust, Python, or 

README.md

@@ -229,24 +229,10 @@ For a high level overview of the components, see the [architecture](architecture
 
 ## Contributing
 
-Contributions are more than welcome, and in many cases we are happy to guide
-contributors through PRs or on Discord. Please refer to the
-[development guide](DEVELOPMENT.md) as well for tips on developments.
+Contributions are welcome and highly appreciated. To get started, check out the
+[**contributing guidelines**](CONTRIBUTING.md).
 
-With that in mind, please note this project is maintained by volunteers, some of
-the best ways to get started are below:
-
-Most tasks are listed in the
-[issue tracker](https://github.com/RustPython/RustPython/issues). Check issues
-labeled with [good first issue](https://github.com/RustPython/RustPython/issues?q=label%3A%22good+first+issue%22+is%3Aissue+is%3Aopen+) if you wish to start coding.
-
-To enhance CPython compatibility, try to increase unittest coverage by checking this article: [How to contribute to RustPython by CPython unittest](https://rustpython.github.io/guideline/2020/04/04/how-to-contribute-by-cpython-unittest.html)
-
-Another approach is to checkout the source code: builtin functions and object
-methods are often the simplest and easiest way to contribute.
-
-You can also simply run `python -I scripts/whats_left.py` to assist in finding any unimplemented
-method.
+You can also join us on [**Discord**](https://discord.gg/vru8NypEhv).
 
 ## Compiling to WebAssembly