Added diagnose frontend and backend implementation

Moonlight.Api/Services/DiagnoseService.cs

@@ -0,0 +1,38 @@
+using Microsoft.Extensions.Logging;
+using Moonlight.Api.Interfaces;
+using Moonlight.Api.Models;
+
+namespace Moonlight.Api.Services;
+
+public class DiagnoseService
+{
+    private readonly IEnumerable<IDiagnoseProvider> Providers;
+    private readonly ILogger<DiagnoseService> Logger;
+
+    public DiagnoseService(IEnumerable<IDiagnoseProvider> providers, ILogger<DiagnoseService> logger)
+    {
+        Providers = providers;
+        Logger = logger;
+    }
+
+    public async Task<DiagnoseResult[]> DiagnoseAsync()
+    {
+        var results = new List<DiagnoseResult>();
+
+        foreach (var provider in Providers)
+        {
+            try
+            {
+                results.AddRange(
+                    await provider.DiagnoseAsync()
+                );
+            }
+            catch (Exception e)
+            {
+                Logger.LogError(e, "An unhandled error occured while processing provider");
+            }
+        }
+
+        return results.ToArray();
+    }
+}