Misc. changes and fixes

[Malivil]

Changelog

• Ported "Add check for checking weapon GetHeadshotMultiplier"
• Fixed detective hats not hiding when the owning player was eaten by the Cannibal
• Cannibal documentation
• Cleanup

Affected Issues

Checklist

• Tested in-game
• Release Notes updated
• API Docs updated
  • Markdown
  • Website (changes marked with "beta only" notation if applicable)
• If this is for a new role:
  • Icons created
  • Tutorial created
  • Documentation
    • CONVARS.md
    • Website (changes marked with "beta only" notation if applicable)
  • ConVars added to ULX list
  • plymeta:IsRoleAbilityDisabled used
• Otherwise:
  • CONVARS.md updated, if applicable
  • ULX updated (either added to list of convars for a role, or PR created in ULX repo [Add link below])