More options for FD

[TheEimer]

FastDownward has a few hardcoded elements right now that should be optional. This includes:

• State Features
• Heuristics
• FD output location (currently logs are discarded)

[TheEimer]

Heuristics and output are covered, state feature selection should be done after progress with cross-domain features

[TheEimer]

Also useful: memory limit and overall runtime for fd planner.

[TheEimer]

Example:

333 self.fd = subprocess.Popen( 334 [ 335 "python3", 336 f"{self.fd_path}", 337 "--overall-time-limit", 338 "300", 339 "--overall-memory-limit", 340 "4G", 341 self.domain_file, 342 self.instance, 343 "--search", 344 self.argstring, 345 ], 346 stdout=fp,