feat: automatic refetch css override (#1588)

* feat: send refect on css change

* feat: revamp ViewLoader

---------

Co-authored-by: alex-Arc <omnivox@LAPTOP-RC5SNBVV.localdomain>

apps/client/src/common/hooks-query/useCssOverride.ts

@@ -0,0 +1,18 @@
+import { useQuery } from '@tanstack/react-query';
+import { MILLIS_PER_HOUR } from 'ontime-utils';
+
+import { getCSSContents } from '../api/assets';
+import { CSS_OVERRIDE } from '../api/constants';
+
+export default function useCssOverride(enabled: boolean) {
+  const { data, status } = useQuery({
+    queryKey: CSS_OVERRIDE,
+    queryFn: ({ signal }) => getCSSContents({ signal }),
+    staleTime: MILLIS_PER_HOUR,
+    enabled
+  });
+
+  return {
+    data: data ?? '', status
+  };
+}