Implemented theme crud and basic theme loading

Moonlight.Api/Http/Controllers/FrontendController.cs

@@ -0,0 +1,25 @@
+using Microsoft.AspNetCore.Mvc;
+using Moonlight.Api.Mappers;
+using Moonlight.Api.Services;
+using Moonlight.Shared.Http.Responses.Frontend;
+
+namespace Moonlight.Api.Http.Controllers;
+
+[ApiController]
+[Route("api/frontend")]
+public class FrontendController : Controller
+{
+    private readonly FrontendService FrontendService;
+
+    public FrontendController(FrontendService frontendService)
+    {
+        FrontendService = frontendService;
+    }
+
+    [HttpGet("config")]
+    public async Task<ActionResult<FrontendConfigDto>> GetConfigAsync()
+    {
+        var configuration = await FrontendService.GetConfigurationAsync();
+        return FrontendConfigMapper.ToDto(configuration);
+    }
+}