docs: update issue templates

Author: bolinocroustibat

.github/ISSUE_TEMPLATE/template.md

@@ -0,0 +1,20 @@
+---
+name: Template
+about: Contributing guidelines
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## Before posting your issue, have you been carefully reading the [contributing](https://github.com/datagouv/datagouv-mcp#-contributing) rules?
+
+**Specifically:**
+
+Is your issue written by an AI?
+
+Do not submit raw, unreviewed AI-generated proposal.
+
+Every proposal must be read, understood, tested, and validated by a human. By submitting a a proposal, you certify that you fully understand it and could explain and defend it in review without relying on an AI assistant.
+
+The issue will be closed without review if it isn't the case.