Post Flood Permissions 2.6.1

• Fix typo in phrase for Post Reply - Enable per conversation rate limiting permission

• Cleanup of capitalization & ordering of permissions
• Add Tickets permissions:
  • Post Reply - Enable per ticket category rate limiting
  • Post Reply - Per ticket category rate limiting
• Add support support for per-forum permission checks instead of just global permisison checks

• Require StandardLib v1.21.0+
• XF2.3 support
• php 8.4+ compatibility fixes
• Fix "New Thread - Per node post rate limiting" permission didn't correctly work