chore: add checkboxes for requirements and LLM assistance classification

Author: mre

.github/pull_request_template.md

@@ -9,14 +9,19 @@ Failure to follow these rules will result in immediate rejection.
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 <!--
-
 👋 Thank you for your contribution!
 Please make sure to check all of the items below.
-
 - 🚨 New tools have to be added to `data/tools/` (NOT directly to the `README.md`).
 - If you propose to deprecate a tool, you have to provide a reason below.
 - More details in the contributors guide, `CONTRIBUTING.md`
-
 -->
 
+### Tool Requirements
 * [ ] I have not changed the `README.md` directly.
+* [ ] The tool has **more than 20 stars** on GitHub (or similar impact).
+* [ ] The project has existed for **at least 3 months**.
+* [ ] The project is **actively maintained**.
+* [ ] The description in the YAML file is strictly **under 500 characters**.
+
+### LLM Classification
+* [ ] This PR was created or heavily edited with the assistance of an LLM / AI agent.