refactor: star rating (#26357)

* refactor: star rating

* transform rating 0 to null in controller dto

* migrate rating 0 to null

* deprecate rating -1

* rating type annotation

* update Rating type

server/src/repositories/media.repository.ts

@@ -107,7 +107,7 @@ export class MediaRepository {
         ExposureTime: tags.exposureTime,
         ProfileDescription: tags.profileDescription,
         ColorSpace: tags.colorspace,
-        Rating: tags.rating,
+        Rating: tags.rating === null ? 0 : tags.rating,
         // specially convert Orientation to numeric Orientation# for exiftool
         'Orientation#': tags.orientation ? Number(tags.orientation) : undefined,
       };