docs: add pull request template

.github/pull_request_template.md

@@ -0,0 +1,16 @@
+## Description
+<!-- Please include a concise summary of the changes and the related issue. -->
+
+Fixes # (issue)
+
+## Declaration of AI usage
+<!-- Did you use any AI tools (e.g., ChatGPT, Copilot, Gemini) to generate this contribution?
+     We want to make sure that a human is always in control of the work contributed. -->
+
+- [ ] I have **not** used AI tools for this contribution.
+- [ ] I **have** used AI tools for this contribution, but I have reviewed and I take full responsibility for the content.
+<!-- Please briefly specify which tools you used and where. -->
+
+## Checklist
+- [ ] I have performed a self-review of my own code/content.
+- [ ] I have read the [contributing to preCICE](https://precice.org/community-contribute-to-precice.html) page.

CONTRIBUTING.md

@@ -0,0 +1,25 @@
+# Contributing to the preCICE Website
+
+Thank you for your interest in contributing to the preCICE website!
+
+## How to contribute
+
+Detailed guidelines on how to contribute can be found on our website:
+[Contribute to preCICE](https://precice.org/community-contribute-to-precice.html)
+
+This includes:
+- Contributing documentation and fixing typos
+- Reporting issues
+- Adding new tutorials
+- Sharing simulation cases
+- Helping other users
+
+## Policy on AI-generated content
+
+We welcome the use of AI tools (e.g., ChatGPT, Copilot, Gemini) to help you contribute.
+However, we want to make sure that a human is always in control and responsible for the work contributed.
+If you use AI tools, please declare them in your Pull Request and ensure that you have reviewed and understood every part of your contribution.
+
+## Local development
+
+For instructions on how to build and run the website locally, please refer to the [README.md](README.md).

content/community/contribute/community-contribute-to-precice.md

@@ -40,6 +40,12 @@ and merge them as soon as possible.
 These pages are written in [Markdown](https://guides.github.com/features/mastering-markdown/) (a very easy language)
 and we also have a [cheatsheet](docs-meta-cheatsheet.html) specifically for this website.
 
+## Policy on AI-generated content
+
+We welcome the use of AI tools (e.g., ChatGPT, Copilot, Gemini) to help you contribute.
+However, we want to make sure that a human is always in control and responsible for the work contributed.
+If you use AI tools, please declare them in your Pull Request and ensure that you have reviewed and understood every part of your contribution.
+
 ## Reporting issues
 
 After discussing a problem in one of our [community channels](community-channels.html), we may conclude that this is a bug