feat: add Gitea action to update language usage stats in profile README.md

Co-authored-by: aider (o3) <aider@aider.chat>

.gitea/workflows/language-stats.yml

@@ -0,0 +1,37 @@
+name: Update Language Stats
+
+on:
+  schedule:
+    - cron: "0 6 * * *"          # run every day at 06:00 UTC
+  workflow_dispatch:             # allow manual runs
+  push:
+    paths:
+      - "scripts/language_stats.py"
+
+jobs:
+  lang-stats:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Python deps
+        run: sudo apt-get update && sudo apt-get install -y python3 python3-pip
+
+      - name: Run language stats script
+        env:
+          GITEA_BASE_URL: ${{ secrets.GITEA_BASE_URL }}
+          GITEA_TOKEN:    ${{ secrets.GITEA_TOKEN }}
+          GITEA_USERNAME: ${{ secrets.GITEA_USERNAME }}
+        run: python3 scripts/language_stats.py
+
+      - name: Commit and push changes
+        run: |
+          git config --global user.name  "lang-stats-bot"
+          git config --global user.email "bot@example.com"
+          git add .profile/README.md
+          if git diff --cached --quiet; then
+            echo "No changes to commit"
+          else
+            git commit -m "chore(profile): update language stats"
+            git push
+          fi