chore : add Gitea CI workflows and .claude settings

- auto-tag-develop: auto version bump + tag on push to develop
- build-docker: build & push Docker image to Gitea registry on tag
- PR template
- .claude/settings.json with project permissions

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/settings.json

@@ -0,0 +1,37 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(git status:*)",
+      "Bash(git add:*)",
+      "Bash(git commit:*)",
+      "Bash(git diff:*)",
+      "Bash(git checkout:*)",
+      "Bash(git push:*)",
+      "Bash(git pull:*)",
+      "Bash(git merge:*)",
+      "Bash(git tag:*)",
+      "Bash(git remote:*)",
+      "Bash(git stash:*)",
+      "Bash(git log:*)",
+      "Bash(git branch:*)",
+      "Bash(docker exec:*)",
+      "Bash(docker ps:*)",
+      "Bash(make start:*)",
+      "Bash(make stop:*)",
+      "Bash(make restart:*)",
+      "Bash(make install:*)",
+      "Bash(make dev-nuxt:*)",
+      "Bash(make shell:*)",
+      "Bash(make cache-clear:*)",
+      "Bash(make migration-migrate:*)",
+      "Bash(make db-reset:*)",
+      "Bash(make test:*)",
+      "Bash(make fixtures:*)",
+      "Bash(make php-cs-fixer-allow-risky:*)",
+      "Bash(chmod +x:*)",
+      "Skill(commit-commands:commit)",
+      "Skill(commit-commands:commit:*)",
+      "WebSearch"
+    ]
+  }
+}