fix(theme): correct scope for internal imports in apply function

src/theme_2.py

@@ -186,7 +186,8 @@ def apply(palette_name: str) -> None:
  global _current_palette
  _current_palette = palette_name
  if palette_name == 'NERV':
-  src.theme_nerv.apply_nerv()
+  from src import theme_nerv
+  theme_nerv.apply_nerv()
   apply_syntax_palette(get_syntax_palette_for_theme(palette_name))
   return