feat(types): export Language and Category for better TS type Inference (#19651)

lib/types.ts

@@ -2,7 +2,7 @@ import type { Context } from 'hono';
 
 // Make sure it's synchronise with scripts/workflow/data.ts
 // and lib/routes/rsshub/routes.ts
-type Category =
+export type Category =
     | 'popular'
     | 'social-media'
     | 'new-media'
@@ -98,7 +98,7 @@ export type Data = {
     ttl?: number;
 };
 
-type Language =
+export type Language =
     | 'af'
     | 'sq'
     | 'eu'