Add mmdebstrap support. Moved docs into docs

.forgejo/workflows/generate-treefiles.yml

@@ -0,0 +1,67 @@
+name: Generate Treefiles
+
+on:
+  push:
+    branches: [ main, develop ]
+    paths:
+      - 'variants/**'
+      - 'package-groups/**'
+      - 'scripts/**'
+      - 'create-debian-atomic.py'
+  pull_request:
+    branches: [ main, develop ]
+    paths:
+      - 'variants/**'
+      - 'package-groups/**'
+      - 'scripts/**'
+      - 'create-debian-atomic.py'
+
+jobs:
+  generate-treefiles:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      with:
+        token: ${{ secrets.GITEA_TOKEN }}
+        
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.11'
+        
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+        
+    - name: Generate treefiles
+      run: |
+        python create-debian-atomic.py --generate-treefiles
+        
+    - name: Check for changes
+      id: check_changes
+      run: |
+        if [ -n "$(git status --porcelain)" ]; then
+          echo "changes=true" >> $GITHUB_OUTPUT
+        else
+          echo "changes=false" >> $GITHUB_OUTPUT
+        fi
+        
+    - name: Commit generated treefiles
+      if: steps.check_changes.outputs.changes == 'true'
+      run: |
+        git config --local user.email "forgejo@example.com"
+        git config --local user.name "Forgejo Actions"
+        git add treefiles/
+        git commit -m "Auto-generate treefiles from variant definitions [skip ci]"
+        git push
+        
+    - name: Validate treefiles
+      run: |
+        python test-integration.py --validate-treefiles
+        
+    - name: Test all variants
+      run: |
+        python test-all-variants.py --quick-test