Modernize codebase

[Amndeep7]

Tracking changes to be made here (this list might be extended and done out of order):

• Update dependencies
  • discord.py from 1.x to 2.x
• Implement slash command support
• Containerize and create a docker-compose.yml
  • database
  • bot
• Add typing
• Remove unnecessary code/dependencies
  • Old Roboragi code
• Documentation
  • Installation instructions
  • Wiki
• Swap to poetry
  • Reorganized repo to match typical poetry structure, changed imports to be relative
  • Fixed imports - requirements.txt was missing dependencies on pyyaml and asyncpg
• Swap asserts out for actual errors
  • https://stackoverflow.com/a/5143044
• Use environment variables instead of a config file
• Github actions
  • linting
  • vulnerabilities
  • dependabot?
  • release
  • dockerfile checking
  • add automation/tracking for synonyms
• package for the bot's image on ghcr and/or dockerhub