[Future] 2.18.3 (18.3.0 semver)

[Victor]

Changelog:

Features:

• Add AppStream metadata for Flatpak package (#264/#265)
  
• Add HUD gun sway when switching and reloading weapons
  
• Attest build provenance with GitHub Actions
  

Fixes:

• Fix class weapon menu crash and other memory management issues
  
• Sanitize map entities (fixes crash when loading some maps)
  
• Fix master-server registration timer issue
  
• Check bot balance when joining empty server
  
• Fix radar flag icon when local player has flag
  
• Fix auth flag on scoreboard after disconnecting
  
• Fix shell ejection in third person
  
• Fix Windows XP support in acr_client.exe build
  
• Fix server handling of client build type and GUID
  
• Disable ac_bot debug messages