Release v0.4.0

feat: add debounce and verbosity control to CLI

- Update version to 0.4.0 to reflect new features.
- Add `debounce` argument to allow custom debounce duration in milliseconds.
- Add `verbose` argument to control log level (`-v` for INFO, `-vv` for DEBUG).
- Refactor `async_watch` to accept `debounce_duration` as a parameter.
- Improve error handling and logging for lock file cleanup.
- Reorganize imports and fix formatting for better readability.

The changes introduce more flexibility by allowing users to control the debounce time and verbosity level through CLI arguments. This improves usability and debugging capabilities.

Signed-off-by: Marcelo Borges <git@marceloborges.dev>