Replace M* table-wrapper classes with typed Resources; add type hints

Two related cleanups from the best-practice audit:

Task 3 — typed Resources instead of MBase / MScene / MLevel / MSetting

The old model classes wrapped the godot_db_manager Table API: each row
read went through table.get_data_at_row_idx(int), Cell.get_data(),
and 'as int' / 'as String' casts that don't actually parse anything
in Godot 4. m_value, m_lock, m_label, ... members shadowed the cell
indirection. Setters round-tripped through table.edit_data() +
Global.database.save_db(). That's a lot of plumbing for what is, in
the end, three flat tables of static strings.

Introduce three @export-typed Resources:
  db/scene_entry.gd     class_name SceneEntry
  db/level_entry.gd     class_name LevelEntry
  db/settings_data.gd   class_name SettingsData

Rewrite scripts/Database.gd so Database.DB holds:
  settings: SettingsData
  levels:   Array[LevelEntry]
  scenes:   Array[SceneEntry]

Build them once at startup from ahog.json, and serialise back to the
same JSON shape on save() so existing progress files keep working.
LevelEntry carries its own object_to_find / object_finding / reset
methods (talking to Global.database for cross-table lookups), and
SceneEntry carries its own mesh_path / audio_sound. Per-scene
dissolve state (value, tick_reference, dissolved) lives on
SceneEntry as non-exported runtime fields.

Delete db/MBase.gd / db/MScene.gd / db/MLevel.gd / db/MSetting.gd.

Update consumers:
- scripts/Setting.gd: read/write Global.database.settings directly,
  call Global.database.save() after each setter.
- scenes/levels/Levels.gd: iterate Global.database.scenes_for_level(
  current_scene_int) instead of mscene.new(i) for every row; scene
  state reads (scene.lock, scene.mesh, scene.counter, ...) replace
  scene.lock() / scene.mesh() / scene.counter() method calls; runtime
  dissolve state lives on the SceneEntry instance instead of mutable
  m_value / m_tick_reference members on MScene; 'dissolved' flag
  replaces set_mesh(null) signalling.
- scenes/UI/choose_scenes/ChooseScene.gd: iterate Global.database
  .levels; level.name / level.thumb property access in place of
  level.name() / level.thumbnail(). configure_reset() loses its
  redundant index argument (LevelEntry knows its own index).
- scripts/event.gd: _on_reset_level signature now takes LevelEntry,
  reset path drops index forwarding.

Task 2 — type hints across the remaining scripts

scripts/Global.gd, scenes/Main.gd, scenes/UI/ending/Ending.gd,
scenes/UI/loading/Loading.gd, scenes/UI/settings/Settings.gd: add
typed parameters and -> return annotations. current_scene_int is now
'int = -1' (sentinel) so callers don't fall into Variant comparisons;
event.gd:_on_reset_level resets it to -1 instead of null.
Settings.gd no longer wraps button_pressed in int() before passing to
the now-typed bool setters.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/Setting.gd

@@ -1,66 +1,69 @@
 extends Node
 
-@onready var setting = load("res://db/MSetting.gd").new()
+# Reads / writes the SettingsData held by Global.database. Applies locale,
+# resolution, and fullscreen state on startup and on any setter call.
 
-func _ready():
+func _ready() -> void:
 	apply_language(translate_int_to_locale(get_setting_language()))
 	apply_resolution()
 	apply_fullscreen()
 
-func apply_language(local):
-	TranslationServer.set_locale(local)
+func apply_language(locale: String) -> void:
+	TranslationServer.set_locale(locale)
 
-func translate_int_to_locale(id):
-	var lang = "en"
+func translate_int_to_locale(id: int) -> String:
+	match id:
+		0: return "en"
+		1: return "fr"
+	return "en"
 
-	if id == 0:
-		lang = "en"
+func apply_resolution() -> void:
+	var res := get_setting_resolution()
+	get_window().content_scale_size = Vector2i(int(res[0]), int(res[1]))
 
-	if id == 1:
-		lang = "fr"
+func apply_fullscreen() -> void:
+	get_window().mode = Window.MODE_EXCLUSIVE_FULLSCREEN if get_setting_fullscreen() else Window.MODE_WINDOWED
 
-	return lang
+func _data() -> SettingsData:
+	return Global.database.settings
 
-func apply_resolution():
-	var res = get_setting_resolution()
-	var screen_size = Vector2i(int(res[0]), int(res[1]))
-	get_window().content_scale_size = screen_size
+func get_setting_language() -> int:
+	return _data().langue
 
-func apply_fullscreen():
-	get_window().mode = Window.MODE_EXCLUSIVE_FULLSCREEN if (get_setting_fullscreen()) else Window.MODE_WINDOWED
-
-func get_setting_language():
-	return setting.get_langue()
-
-func set_setting_language(value):
-	setting.set_langue(value)
+func set_setting_language(value: int) -> void:
+	_data().langue = value
+	Global.database.save()
 	apply_language(translate_int_to_locale(value))
 
-func get_setting_gyrosocpe():
-	return setting.get_gyroscope()
+func get_setting_gyrosocpe() -> bool:
+	return _data().gyroscope
 
-func set_setting_gyroscope(value):
-	setting.set_gyroscope(value)
+func set_setting_gyroscope(value: bool) -> void:
+	_data().gyroscope = value
+	Global.database.save()
 
-func get_setting_ambient_sound():
-	return setting.get_ambient_sound()
+func get_setting_ambient_sound() -> bool:
+	return _data().ambient_sound
 
-func set_setting_ambient_sound(value):
-	setting.set_ambient_sound(value)
+func set_setting_ambient_sound(value: bool) -> void:
+	_data().ambient_sound = value
+	Global.database.save()
 
-func get_setting_resolution():
-	return setting.get_resolution()
+func get_setting_resolution() -> PackedStringArray:
+	return _data().resolution_split()
 
-func set_setting_resolution(value):
-	setting.set_resolution(value)
+func set_setting_resolution(value: String) -> void:
+	_data().resolution = value
+	Global.database.save()
 	apply_resolution()
 
-func get_setting_fullscreen():
-	return setting.get_fullscreen()
+func get_setting_fullscreen() -> bool:
+	return _data().fullscreen
 
-func set_setting_fullscreen(value):
-	setting.set_fullscreen(value)
+func set_setting_fullscreen(value: bool) -> void:
+	_data().fullscreen = value
+	Global.database.save()
 	apply_fullscreen()
 
-func get_setting_version():
-	return setting.get_version()
+func get_setting_version() -> String:
+	return "v" + _data().version