Add localization support for achievements: implement language-specific titles and update UI components

ui/achievements/achievement_controller.gd

@@ -2,6 +2,10 @@ extends Node
 ## Player-wide achievement progress and the shared in-game notification queue.
 const E = preload("res://world/owniverse/math/exact.gd")
 const ITEM = preload("res://ui/achievements/achievement_item.tscn")
+const TITLES = {
+    "en": preload("res://ui/achievements/achievements.en.png"),
+    "ru": preload("res://ui/achievements/achievements.ru.png"),
+}
 var progress_path: String = "user://achievements.cfg"
 const HOLD_SECONDS = 3.0
 const FADE_SECONDS = 0.3
@@ -158,6 +162,8 @@ func _display_event(event: Dictionary) -> void:
     panel.show()
 
 func _rebuild_list() -> void:
+    var title: TextureRect = stage.get_node_or_null("Achievements/Header/Title")
+    if title != null: title.texture = TITLES[locale]
     var unlocked := 0
     var position := 1
     for id in definitions: