OmniPanel v18.5.299 - Rules, TPA and Punishment X Player Directory

Real latest-source changes:
- Added /rules as a config-only paginated GUI through the existing RuntimeCommandSupport router.
- Added configurable TPA request cooldown, accepted-request teleport delay, request expiry and move cancellation.
- Added clickable ACCEPT and DENY chat actions for recipients and a clickable CANCEL action for requesters.
- Added safe delayed teleport state with offline checks and movement cancellation.
- Added a strict A-Z player directory and A-Z letter selector inside the existing Punishment X target panel.
- Added /rules and /tpcancel command visibility and metadata.
- Preserved the corrected Paper 1.21.11 inventory-event API signatures from v18.5.298.

No old-source replacement, patch manager, overlay listener or duplicate teleport/punishment backend was added.
