Add AI policy to contribution guidelines, PR and issue templates

The amount of AI generated PRs is increasing while their quality often remains poor. The introduced guidelines aim to reduce the number of poor quality AI PRs while simultaneously increasing the quality of high quality AI PRs.

New checkboxes for compliance with the AI policy and to increase the PR quality are introduced to the PR template.

Prohibit AI generated issue and PR descriptions

.github/CONTRIBUTING.md

@@ -3,6 +3,19 @@
 NewPipe contribution guidelines
 ===============================
 
+## AI policy
+
+* Using generative AI to develop new features or making larger code changes is generally prohibited. Please refrain from contributions which are heavily depending on AI generated source code because they are usually lacking a fundamental understanding of the overall project structure and thus come with poor quality. However, you are allowed to use gen. AI if you
+  * are aware of the project structure,
+  * ensure that the generated code follows the project structure,
+  * fully understand the generated code, and
+  * review the generated code completely.
+* Using AI to find the root cause of bugs and generating small fixes might be acceptable. However, gen. AI often does not fix the underlying problem but is trying to fix the symptoms. If you are using AI to fix bugs, ensure that the root cause is tackled.
+* The use of AI to generate documentation is allowed. We ask you to thoroughly check the quality of generated documentation – wrong, misleading or uninformative documentation is useless and wastes the reader's time. Ensure that reasoning is documented.
+* Using generative AI to write or fill in PR or issue templates is prohibited. Those texts are often lengthy and miss critical information.
+* PRs and issues that do not follow this AI policy can be closed without further explanation.
+
+
 ## Crash reporting
 
 Report crashes through the **automated crash report system** of NewPipe.

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -26,6 +26,8 @@ body:
           required: true
         - label: "I have read and understood the [contribution guidelines](https://github.com/TeamNewPipe/NewPipe/blob/dev/.github/CONTRIBUTING.md)."
           required: true
+        - label: "I have read and understood the [AI policy](https://github.com/TeamNewPipe/NewPipe/blob/dev/.github/CONTRIBUTING.md#ai-policy). The content of this bug report is not generated by AI."
+          required: true
 
   - type: input
     id: app-version

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -25,6 +25,8 @@ body:
           required: true
         - label: "I have read and understood the [contribution guidelines](https://github.com/TeamNewPipe/NewPipe/blob/dev/.github/CONTRIBUTING.md)."
           required: true
+        - label: "I have read and understood the [AI policy](https://github.com/TeamNewPipe/NewPipe/blob/dev/.github/CONTRIBUTING.md#ai-policy). The content of this request is not generated by AI."
+          required: true
 
 
   - type: textarea

.github/PULL_REQUEST_TEMPLATE.md

@@ -32,3 +32,5 @@ The APK can be found by going to the "Checks" tab below the title. On the left p
 
 #### Due diligence
 - [ ] I read the [contribution guidelines](https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md).
+- [ ] The proposed changes follow the [AI policy](https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md#ai-policy).
+- [ ] I tested the changes using an emulator or a physical device.