feat(tasks): add gobuster integration

[ocervell]

Integrate gobuster in secator/tasks/gobuster.py.
Add both dns mode and other modes using a --mode internal flag to pick and an on_cmd hook to change the command with the mode picked.

@staticmetho
def on_cmd(self):
mode = self.get_opt_value('mode', 'dns')
self.cmd = cmd.replace("gobuster", f"gobuster {mode}")

Add a test fixture in tests/integration/fixtures/gobuster.json and an input in tests/integration/inputs.py.