add output directory option to `run` command

[andre15silva]

We are "using" this option already in the tests (see

gitbug-java/test/test_all.py

Lines 27 to 43 in 5f044c8

	output_dir = os.path.join(temp_dir, "gitbug-java-output", str(uuid.uuid4()))
	try:
	# Checkout the bug and check correctness
	run = run_command(
	f"gitbug-java checkout {bid} {temp_dir} {'--fixed' if fixed else ''}"
	)
	if run.returncode != 0:
	print(f"{bid} ({fixed}) failed to checkout")
	print(run.stdout.decode("utf-8"))
	print(run.stderr.decode("utf-8"))
	return
	# Run the bug and check results
	run = run_command(
	f"gitbug-java run {temp_dir} --act_cache_dir={act_cache_dir} --output={output_dir}"
	)

), but it does not exist.

We should add it