chore: init project structure

Discovery synthesis, docs tree, Python src layout, CLAUDE.md, pyproject.toml.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/gitea_dashboard/cli.py

@@ -0,0 +1,6 @@
+"""Entry point for gitea-dashboard CLI."""
+
+
+def main():
+    """Run the dashboard."""
+    pass