BLOG-79 AI review bot (#83)

### Description

- Use Qudo Merge as self-hosted PR agent
- Add a workflow that auto comment /improve command to start the agent

### Package Changes

_No response_

### Screenshots

_No response_

### Reference

Resolves #79

### Checklist

- [x] A milestone is set
- [x] The related issuse has been linked to this branch

Reviewed-on: #83
Co-authored-by: SquidSpirit <squid@squidspirit.com>
Co-committed-by: SquidSpirit <squid@squidspirit.com>

.gitea/workflows/pr_agent.yaml

@@ -0,0 +1,20 @@
+name: Auto Comment On PR
+
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+
+jobs:
+  add_improve_comment:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Add '/improve' comment to PR
+        run: |
+          echo "Target URL: ${{ vars.GIT_PROVIDER_URL }}/api/v1/repos/${{ gitea.repository }}/issues/${{ gitea.ref_name }}/comments"
+          curl --fail -X POST \
+            -H "Authorization: token ${{ secrets.BOT_PAT }}" \
+            -H "Content-Type: application/json" \
+            -d '{"body": "/improve"}' \
+            "${{ vars.GIT_PROVIDER_URL }}/api/v1/repos/${{ gitea.repository }}/issues/${{ gitea.ref_name }}/comments"