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/tables_header.gd

@@ -1,17 +1,17 @@
-"""
-class GDDBTablesHeader
-"""
-
-class_name GDDBTablesHeader
-
-tool
-extends Control
-
-signal add_table
-
-# Called when the node enters the scene tree for the first time.
-func _ready():
-	$add_table_btn.connect("pressed", self, "on_add_table_btn_pressed")
-
-func on_add_table_btn_pressed():
-	emit_signal("add_table")
+@tool
+"""
+class GDDBTablesHeader
+"""
+
+class_name GDDBTablesHeader
+
+extends Control
+
+signal add_table
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	$add_table_btn.connect("pressed", Callable(self, "on_add_table_btn_pressed"))
+
+func on_add_table_btn_pressed():
+	emit_signal("add_table")