feat: expand multiplayer, chat, and release support

- add network NPC synchronization and dialogue interactions
- add world bulletin publishing and display
- improve authentication, session refresh, and appearance sync
- synchronize player direction and movement animations
- improve input focus and progressive Web loading
- add macOS/Windows builds and deployment configuration
- include required fonts, shaders, and runtime assets

scenes/characters/player.tscn

@@ -157,6 +157,8 @@ _data = {
 
 [node name="Player" type="CharacterBody2D"]
 script = ExtResource("1_script")
+collision_layer = 1
+collision_mask = 3
 
 [node name="Sprite2D" type="Sprite2D" parent="."]
 texture_filter = 2