Main.py overhaul and deployment tests

[brownsugar-bobamilktea]

• Rewrote main.py as a class for modularity and to allow monkey patching
• Created deployment test:
  • Monkeypatched away several functions that main.py needs but requires internet access
  • Tests that the bot can run with minimal external API calls, e.g., the main.py has no import or syntax errors on launch
• Marked deployment test to differentiate it from unit tests
• Changed actions file to run unit and deployment tests separately for clarity

[brownsugar-bobamilktea]

oh

[howardt12345]

lgtm