feat(event): implement event management commands and status handling

- Add complete event command functionality including start/end/status management
- Implement event status tracking in TrixinityEvent class with getter/setter
- Update placeholder expansion to support event status and current eventer
- Modify ClearEventerCommand and EventerCommand to properly handle eventer role
- Remove unused permissions and clean up plugin.yml
- Add tab completion for event commands

src/main/resources/config.yml

@@ -4,9 +4,6 @@
 # Aktuální eventer
 current_eventer: ""
 
-# Stav eventu (started/ended)
-event_status: "ended"
-
 # Seznam všech eventerů pro historii
 eventers:
   # Příklad: BabyMsp2k: true