Run godot --convert-3to4 (automated conversion)

Apply Godot 4.6 automated conversion: renames Spatial.translate->position,
margin_*->offset_*, tool->@tool, .empty()->.is_empty(), DynamicFont->FontFile,
onready->@onready, export()->@export, and many more.

127 files changed by the tool. Manual fixes still required for:
 - godot_db_manager plugin (incompatible APIs: WindowDialog, Tabs, etc.)
 - lod plugin (Spatial -> Node3D renames)
 - ResourceLoader.load_interactive removed -> load_threaded_request
 - OS.set_window_fullscreen removed -> DisplayServer
 - Viewport.set_size_override removed

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

addons/godot_db_manager/table_item.gd

@@ -1,10 +1,10 @@
+@tool
 """
 class GDDBTableItem
 """
 
 class_name GDDBTableItem
 
-tool
 extends Control
 
 signal select_item
@@ -18,9 +18,9 @@ var m_is_selected = false
 
 # Called when the node enters the scene tree for the first time.
 func _ready():
-	$select_btn.connect("pressed", self, "on_select_btn_pressed")
-	$edit_table_btn.connect("pressed", self, "on_edit_table_btn_pressed")
-	$delete_table_btn.connect("pressed", self, "on_delete_table_btn_pressed")
+	$select_btn.connect("pressed", Callable(self, "on_select_btn_pressed"))
+	$edit_table_btn.connect("pressed", Callable(self, "on_edit_table_btn_pressed"))
+	$delete_table_btn.connect("pressed", Callable(self, "on_delete_table_btn_pressed"))
 	$select.hide()
 
 # sets the table id