Fix gdlint findings in Global / Database / Levels

- Global.gd: move @onready var animation below the regular vars
  (gdlint class-definitions-order expects onready vars after
  public/private vars).
- Database.gd::DB: move the three _*_PROPS constants above the vars
  (constants come before vars in a class body).
- Levels.gd:_search_button_to_use: drop the elif after a branch
  that returns (no-elif-return).
- Levels.gd:_gyroscope_changed_{down,up}: continuation lines of the
  multi-line return mixed two tabs + three spaces; normalised to
  pure tabs.

No semantic change: @onready is property-level so source ordering
doesn't affect init; elif after a return is equivalent to if; the
continuation indent is cosmetic.

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

scenes/levels/Levels.gd

@@ -75,7 +75,7 @@ func _get_node_animated() -> Node:
 func _search_button_to_use(counter: int) -> Node:
 	if counter == 0:
 		return object_first.instantiate()
-	elif counter == meshes.size() - 1:
+	if counter == meshes.size() - 1:
 		return object_last.instantiate()
 	return object_std.instantiate()
 
@@ -184,13 +184,13 @@ func _gyroscope_changed_right(gyroscope: Vector3) -> bool:
 func _gyroscope_changed_down(gyroscope: Vector3) -> bool:
 	return (gyroscope.abs().z - gyroscope_value_old.abs().z) > GYROSCOPE_MAX_DIFF and \
 			gyroscope.z > gyroscope_value_old.z or \
-		   (gyroscope.abs().x - gyroscope_value_old.abs().x) > GYROSCOPE_MAX_DIFF and \
+			(gyroscope.abs().x - gyroscope_value_old.abs().x) > GYROSCOPE_MAX_DIFF and \
 			gyroscope.x > gyroscope_value_old.x
 
 func _gyroscope_changed_up(gyroscope: Vector3) -> bool:
 	return (gyroscope.abs().z - gyroscope_value_old.abs().z) > GYROSCOPE_MAX_DIFF and \
 			gyroscope.z < gyroscope_value_old.z or \
-		   (gyroscope.abs().x - gyroscope_value_old.abs().x) > GYROSCOPE_MAX_DIFF and \
+			(gyroscope.abs().x - gyroscope_value_old.abs().x) > GYROSCOPE_MAX_DIFF and \
 			gyroscope.x < gyroscope_value_old.x
 
 func _start_dissolve(key: String) -> void: