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-backend/infra/Cargo.toml

@@ -11,6 +11,7 @@ broker-nats = ["dep:futures-util", "k-core/broker-nats"]
 auth-oidc = ["dep:openidconnect", "dep:url", "dep:axum-extra"]
 auth-jwt = ["dep:jsonwebtoken"]
 jellyfin = ["dep:reqwest"]
+local-files = ["dep:walkdir", "dep:base64", "sqlite"]
 
 [dependencies]
 k-core = { git = "https://git.gabrielkaszewski.dev/GKaszewski/k-core", features = [
@@ -46,3 +47,5 @@ jsonwebtoken = { version = "10.2.0", features = [
     "rsa",
     "rust_crypto",
 ], optional = true }
+walkdir = { version = "2", optional = true }
+base64 = { version = "0.22", optional = true }