build(dev): enhance local development environment and setup workflow (#358)

Improve the developer experience by providing structured setup scripts,
VS Code workspace configurations, and detailed documentation.

- Add VS Code workspace configuration and recommended settings
- Update README.md with system requirements and VS Code setup instructions
- Refactor `script/setup` to include Python 3.11+ validation and system dependency checks
- Add option to skip PulseAudio wait in `docker-entrypoint.sh` for local development
- Update `.gitignore` to ensure consistent version file handling

.vscode/settings.json

@@ -0,0 +1,13 @@
+{
+  "python.defaultInterpreterPath": "./.venv/bin/python",
+  "python.testing.pytestEnabled": true,
+  "python.testing.pytestArgs": ["tests"],
+  "python.testing.pytestAutoInclude": false,
+  "python.linting.enabled": true,
+  "python.linting.flake8Enabled": true,
+  "python.linting.mypyEnabled": true,
+  "python.formatting.provider": "none",
+  "python.terminal.activateEnvironment": true,
+  "python.terminal.executeInShell": true,
+  "python.pythonPath": "./.venv/bin/python"
+}