Refactors model filter event handling to core module

Moves the `TextChanged` event handler for the driver model filter from the UI script to the core `Register-EventHandlers` function.

This change centralizes the logic and makes the handler more generic by retrieving the UI state from the window's tag instead of relying on a global variable.

FFUDevelopment/FFUUI.Core/FFUUI.Core.Initialize.psm1

@@ -577,6 +577,12 @@ function Register-EventHandlers {
                 $eventSource.IsEnabled = $true
             }
         })
+    $State.Controls.txtModelFilter.Add_TextChanged({
+            param($sourceObject, $textChangedEventArgs)
+            $window = [System.Windows.Window]::GetWindow($sourceObject)
+            $localState = $window.Tag
+            Search-DriverModels -filterText $localState.Controls.txtModelFilter.Text -State $localState
+        })
 }
 
 Export-ModuleMember -Function *