Refactor SQLite Database Provider

- Removed unused classes and files related to SQLite database provider, including SqliteDesignTimeJellyfinDbFactory, ModelBuilderExtensions, PragmaConnectionInterceptor, AssemblyInfo, SqliteDatabaseProvider, DateTimeKindValueConverter.
- Updated tests to remove dependencies on removed classes and adjusted mocking for configuration sections.
- Added Microsoft.EntityFrameworkCore.Sqlite package reference to test project.
- Improved string handling in tests for better consistency and clarity.
- Refactored logging methods in JellyfinApplicationFactory for better readability and maintainability.

publish/Resources/Configuration/startup.default.json

@@ -0,0 +1,14 @@
+{
+  "$schema": "https://json.schemastore.org/jellyfin-startup",
+  "// Comment": "Startup configuration defaults for Jellyfin Server",
+  "// Note": "For Linux: Use /var/lib/jellyfin, For Windows: Use C:/ProgramData/jellyfin",
+  "// Documentation": "These values are used when no command-line args or environment variables are set",
+  "Paths": {
+    "DataDir": "/var/lib/jellyfin",
+    "ConfigDir": "/var/lib/jellyfin",
+    "CacheDir": "/var/lib/jellyfin",
+    "LogDir": "/var/lib/jellyfin",
+    "TempDir": "/var/lib/jellyfin",
+    "WebDir": "/var/lib/jellyfin"
+  }
+}