Add Kit GUI (menu/anvil) and integrate MenuListener

Introduce a full chest-based kit selection UI and anvil search: add Menu, MenuHolder, KitSelectorMenu, KitItemFactory, AnvilSearchMenu (with AnvilSearchTracker) and a central MenuListener to dispatch menu and anvil interactions. Integrate the GUI into KitCommand (opens selector on no args, enforces mid-game selection rules, remove/replace backup kits when switching) and register MenuListener in the main plugin. Add permission speedhg.bypass and update ConnectListener to kick joiners when a game is running unless they have the bypass permission. Remove static playstyle lore from language file (now rendered dynamically), and apply small import/refactor cleanups (use wildcard imports for kit impls, java.util.* replacements).

src/main/resources/languages/en_US.yml

@@ -86,22 +86,12 @@ kits:
       - ' '
       - 'Select a kit mid-round at any time.'
       - 'All kits are available to pick.'
-      - ' '
-      - 'PlayStyle: §e%playstyle%'
-      - ' '
-      - 'Left-click to select'
-      - 'Right-click to change playstyle'
   gladiator:
     name: '<gradient:dark_gray:gray><bold>Gladiator</bold></gradient>'
     lore:
       - ' '
       - 'Use your ability to fight enemies'
       - 'in a 1v1 above the skies.'
-      - ' '
-      - 'PlayStyle: §e%playstyle%'
-      - ' '
-      - 'Left-click to select'
-      - 'Right-click to change playstyle'
     items:
       ironBars:
         name: '<gray>Cage</gray>'
@@ -117,11 +107,6 @@ kits:
       - ' '
       - 'DEFENSIVE:'
       - 'Summon a bunker for protection'
-      - ' '
-      - 'PlayStyle: §e%playstyle%'
-      - ' '
-      - 'Left-click to select'
-      - 'Right-click to change playstyle'
     items:
       steal:
         name: '§cSteal Kit'
@@ -142,11 +127,6 @@ kits:
       - ' '
       - 'DEFENSIVE:'
       - 'Summon snowballs and freeze enemies'
-      - ' '
-      - 'PlayStyle: §e%playstyle%'
-      - ' '
-      - 'Left-click to select'
-      - 'Right-click to change playstyle'
     items:
       snowball:
         name: '§bFreeze'
@@ -166,11 +146,6 @@ kits:
       - ' '
       - 'DEFENSIVE:'
       - 'Create a shield for protection'
-      - ' '
-      - 'PlayStyle: §e%playstyle%'
-      - ' '
-      - 'Left-click to select'
-      - 'Right-click to change playstyle'
     items:
       wither:
         name: '§8Deafening Beam'