feat: add translation workflow and remove old translation.json

.github/workflows/translate.yml

@@ -0,0 +1,28 @@
+name: Auto Translate
+
+on:
+  workflow_dispatch:
+
+jobs:
+  translate:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Translate with i18n-ai-translate
+        uses: taahamahdi/i18n-ai-translate@master
+        with:
+          json-file-path: src/locales/en/translation.json
+          api-key: ${{ secrets.GEMINI_API_KEY }}
+          engine: gemini
+          output-languages: de fr it ko pt-br ru zh
+
+      - name: Commit and push translations
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          git add src/locales/
+          git diff --staged --quiet || git commit -m "chore: auto-translate to multiple languages [skip ci]"
+          git push