fix(client): resolve all gdlint warnings — zero warnings policy

Fix 354 gdlint warnings across 65 files: 194 class-definitions-order
(reorder declarations), 138 max-line-length (split long lines),
22 code issues (unused args, no-else-return, naming). Update .gdlintrc
to exclude addons/ and raise max-public-methods for test files.
No logic changes — declaration order, whitespace, and naming only.

Ticket: #783

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

client/scripts/rendering/world_renderer.gd

@@ -13,13 +13,13 @@ extends Node2D
 #     Overhead (Node2D)              — z:300 ceiling/upper structure (placeholder)
 #   FogOverlay (Node2D)              — z:900 fog shader (OUTSIDE FogGroup)
 
+var _last_tick: int = -1
+
 @onready var tile_renderer = $FogGroup/FloorTiles
 @onready var fog_renderer = $FogOverlay
 @onready var entity_renderer = $FogGroup/YSortGroup/Entities
 @onready var sound_indicator_renderer = $SoundIndicators  # #126 D-018 medium-range indicators
 
-var _last_tick: int = -1
-
 func _ready() -> void:
 	print("WorldRenderer: Initialized (D-049 z-stack)")