fix: add mysql.connector.locales to hiddenimports to resolve 'no localization support for language eng' error in PyInstaller build

DatabaseApp.spec

@@ -6,7 +6,7 @@ a = Analysis(
     pathex=[],
     binaries=[],
     datas=[],
-    hiddenimports=['mysql.connector', 'kivy.core.window.window_sdl2', 'win32timezone'],
+    hiddenimports=['mysql.connector', 'mysql.connector.locales', 'mysql.connector.locales.eng', 'mysql.connector.plugins', 'mysql.connector.plugins.mysql_native_password', 'kivy.core.window.window_sdl2', 'win32timezone'],
     hookspath=[],
     hooksconfig={},
     runtime_hooks=[],