[Worker] rewrite worker.sh in python for better maintainability

[mm4rks]

Proposal

Rewrite the worker.sh script into python:

• git handler + tests
• docker handler + tests
• systemd service change (invoke python worker.py with options, run as correct user that has access to python modules)
• add user to docker group
• install.sh for installing requirements.txt, registering service etc.
• add worker queue (simple: read sample hashes from file) over samples in data/samples
• filtering samples by type (pe, elf, macos, etc)
• move and rename samples (sha256sum in data/samples)
• add "incoming" folder that holds files for the above
• add progress logging and stateful restarts (save samples to process, last processed, last run type, etc.)
• save/load state in json file
• refactor filter.py and use it as submodule in worker.py
• add integration test, that tests the whole thing on some samples.

Approach

work on branch: python-worker