Create build workflow

.github/workflows/build.yml

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+name: Build wiki
+on:
+  push:
+    branches:
+      master
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - name: Install SSH private key
+      if: "env.TOKEN != ''"
+      env:
+        TOKEN: ${{ secrets.TOKEN }}
+      uses: yt-dlp/ssh-agent@v0.5.3
+      with:
+        ssh-private-key: ${{ env.TOKEN }}
+    - name: Push to wiki
+      if: "env.TOKEN != ''"
+      env:
+        TOKEN: ${{ secrets.TOKEN }}
+      run: |
+        git remote add upstream git@github.com:yt-dlp/yt-dlp.wiki
+        git fetch upstream
+        git push --force upstream master

.gitignore

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+secrets/
+
+
+# Text Editor / IDE
+.idea
+*.iml
+.vscode
+*.sublime-*
+*.code-workspace