Prepare project for public release

.gitignore

@@ -0,0 +1,27 @@
+# Local configuration and credentials
+.env
+.env.*
+!.env.example
+config.ini
+
+# Runtime state and logs
+state.json
+state.json.tmp
+*.log
+
+# Python environments and generated files
+.venv/
+venv/
+__pycache__/
+*.py[cod]
+.pytest_cache/
+.ruff_cache/
+.mypy_cache/
+.coverage
+htmlcov/
+
+# Editor and operating-system metadata
+.DS_Store
+.idea/
+.vscode/
+*.swp