✨ feat(et): add eest clean to remove all generated folders and files

[danceratopz]

Originally suggested in #461.

This would delete any cache files, build artifacts and potentially uv's .venv and tox's .tox:

execution-spec-tests/src/entry_points/eest_utils.py

Lines 94 to 108 in 99f17f7

	def clean(remove_venv: bool = False):
	"""
	Cleans the repository of all generated files and directories:
	```
	rm -rf .tox .cache .pytest_cache .mypy_cache fixtures build venv
	```
	By default, the virtual environment is not removed.
	"""
	items_to_remove = [".tox", ".pytest_cache", ".mypy_cache", "fixtures", "build", "site", "venv"]
	for item in items_to_remove:
	if os.path.exists(item):
	if item == "venv" and not remove_venv:
	continue
	shutil.rmtree(item, ignore_errors=True)
	logger.warning(f"Deleted `{item}`")

Other possible additions could be:

• ~/.cache/ethereum-spec-evm-resolver/ which stores the download execution-specs branches for each configured fork.
• ~/.cache/uv/ although I'd hope that this is not necessary.