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/domain/src/lib.rs

@@ -14,7 +14,7 @@ pub mod value_objects;
 // Re-export commonly used types
 pub use entities::*;
 pub use errors::{DomainError, DomainResult};
-pub use ports::{Collection, IMediaProvider, SeriesSummary};
+pub use ports::{Collection, IMediaProvider, ProviderCapabilities, SeriesSummary, StreamingProtocol};
 pub use repositories::*;
 pub use iptv::{generate_m3u, generate_xmltv};
 pub use services::{ChannelService, ScheduleEngineService, UserService};