Settable Pupil Remote port via argument parsing

[papr]

This PR implements #1315 by fixing #1377

Todos:

• Test on Linux/Mac when running from bundle
• Test on Windows when running from source and from bundle

---

Help Texts

> python main.py -h
usage: main.py [-h] [--debug] [--profile] {capture,service,player} ...

optional arguments:
  -h, --help            show this help message and exit
  --debug               display debug log messages
  --profile             profile the application's CPU time

Applications:
  Select which application you want to run, by default `capture`

  {capture,service,player}
    capture             Real-time processing and recording
    service             VR/AR interface
    player              Process, visualize, and export recordings

> python main.py capture -h
usage: main.py capture [-h] [-P PORT]

optional arguments:
  -h, --help            show this help message and exit
  -P PORT, --port PORT  Pupil Remote port

> python main.py service -h
usage: main.py service [-h] [-P PORT]

optional arguments:
  -h, --help            show this help message and exit
  -P PORT, --port PORT  Pupil Remote port

>  python main.py player -h
usage: main.py player [-h] [recording]

positional arguments:
  recording   path to recording

optional arguments:
  -h, --help  show this help message and exit

[ckbaumann]

Nice ✨ code!

[willpatera]

@papr I tested the CL args on Windows bundle with Capture and Player (not service yet). All seems to be working as designed. 👍