docs: require Linear issues and auto-ship PRs

Agents must link every branch and PR to Linear, fill the
WHAT/WHY/HOW template, and commit after tests and pre-commit
without asking.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitea/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,19 @@
+## WHAT
+
+<!-- What changed? -->
+
+## WHY
+
+<!-- Why this change? -->
+
+## HOW
+
+<!-- How was it implemented? Include verification. -->
+
+## Linear Issue
+
+<!-- Required. Identifier + URL, e.g. MAN-133 https://linear.app/maneco-workspace/issue/MAN-133 -->
+
+## Comments
+
+<!-- Notes for reviewers. Screenshots, follow-ups, out of scope. -->