feat: add local files provider with indexing and rescan functionality

- Implemented LocalFilesProvider to manage local video files.
- Added LocalIndex for in-memory and SQLite-backed indexing of video files.
- Introduced scanning functionality to detect video files and extract metadata.
- Added API endpoints for listing collections, genres, and series based on provider capabilities.
- Enhanced existing routes to check for provider capabilities before processing requests.
- Updated frontend to utilize provider capabilities for conditional rendering of UI elements.
- Implemented rescan functionality to refresh the local files index.
- Added database migration for local files index schema.

k-tv-frontend/lib/types.ts

@@ -82,8 +82,22 @@ export interface ScheduleConfig {
 
 // Config
 
+export type StreamingProtocol = "hls" | "direct_file";
+
+export interface ProviderCapabilities {
+  collections: boolean;
+  series: boolean;
+  genres: boolean;
+  tags: boolean;
+  decade: boolean;
+  search: boolean;
+  streaming_protocol: StreamingProtocol;
+  rescan: boolean;
+}
+
 export interface ConfigResponse {
   allow_registration: boolean;
+  provider_capabilities: ProviderCapabilities;
 }
 
 // Auth