refactor: consolidate CI pipeline, remove third-party deps

.github/workflows/watch.yml

@@ -0,0 +1,126 @@
+name: Weekly Platform Sync
+
+on:
+  schedule:
+    - cron: "0 6 * * 1"  # Every Monday at 06:00 UTC
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+concurrency:
+  group: watch-updates
+  cancel-in-progress: true
+
+jobs:
+  scrape-and-update:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.12"
+
+      - name: Install dependencies
+        run: pip install pyyaml
+
+      - name: Regenerate platform configs from live sources
+        run: |
+          python3 -c "
+          import sys, yaml
+          sys.path.insert(0, 'scripts')
+
+          def str_representer(dumper, data):
+              if any(c in data for c in '()[]{}:#'):
+                  return dumper.represent_scalar('tag:yaml.org,2002:str', data, style='\"')
+              return dumper.represent_scalar('tag:yaml.org,2002:str', data)
+          yaml.add_representer(str, str_representer)
+
+          # Regenerate retroarch.yml from live System.dat + core-info
+          from scraper.libretro_scraper import Scraper as LS
+          config = LS().generate_platform_yaml()
+          with open('platforms/retroarch.yml', 'w') as f:
+              yaml.dump(config, f, default_flow_style=False, allow_unicode=True, sort_keys=False)
+          print(f'RetroArch: {len(config[\"systems\"])} systems, version={config[\"version\"]}')
+
+          # Regenerate batocera.yml from live batocera-systems
+          from scraper.batocera_scraper import Scraper as BS
+          config = BS().generate_platform_yaml()
+          with open('platforms/batocera.yml', 'w') as f:
+              yaml.dump(config, f, default_flow_style=False, allow_unicode=True, sort_keys=False)
+          print(f'Batocera: {len(config[\"systems\"])} systems, version={config[\"version\"]}')
+          "
+
+      - name: Auto-fetch missing BIOS files
+        run: |
+          python scripts/generate_db.py --bios-dir bios --output database.json
+          python scripts/auto_fetch.py --all 2>&1 | tee /tmp/fetch_report.txt || true
+
+      - name: Deduplicate BIOS files
+        run: python scripts/dedup.py
+
+      - name: Regenerate database and documentation
+        run: |
+          python scripts/generate_db.py --force --bios-dir bios --output database.json
+          python scripts/generate_readme.py --db database.json --platforms-dir platforms
+
+      - name: Check for changes
+        id: check
+        run: |
+          if git diff --quiet && [ -z "$(git ls-files --others --exclude-standard)" ]; then
+            echo "has_changes=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "has_changes=true" >> "$GITHUB_OUTPUT"
+            echo "Changes detected:"
+            git diff --stat
+            git ls-files --others --exclude-standard | head -20
+          fi
+
+      - name: Create or update PR
+        if: steps.check.outputs.has_changes == 'true'
+        run: |
+          DATE=$(date +%Y-%m-%d)
+          BRANCH="auto/update-platforms-${DATE}"
+
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+          git checkout -b "$BRANCH"
+          git add bios/ platforms/ database.json README.md CONTRIBUTING.md
+          git commit -m "chore: auto-update platform data ($DATE)"
+          git push origin "$BRANCH" --force-with-lease
+
+          existing_pr=$(gh pr list --head "$BRANCH" --json number --jq '.[0].number' 2>/dev/null || true)
+
+          if [ -n "$existing_pr" ] && [ "$existing_pr" != "null" ]; then
+            echo "Updating existing PR #${existing_pr}"
+          else
+            gh pr create \
+              --title "Auto-update: Platform data ($DATE)" \
+              --body "$(cat <<'EOF'
+          ## Automated Platform Update
+
+          This PR was automatically generated by the weekly platform watch.
+
+          ### What changed
+          - Scraped latest BIOS requirements from libretro System.dat and batocera-systems
+          - Auto-fetched new BIOS files from public sources
+          - Deduplicated and regenerated database + documentation
+
+          ### Review Checklist
+          - [ ] New BIOS files are valid
+          - [ ] Platform configs are correct
+          - [ ] database.json and README look good
+
+          ---
+          *Auto-generated by [watch-updates](../../actions/workflows/watch-updates.yml)*
+          EOF
+          )" \
+              --label "automated,platform-update"
+          fi
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}