Dashboard Page - Appointments:

- create separate dashboard components for doctor and patient
- add appointments to dashboard components
- add code to backend for appointments retrieval

frontend/Services/Http/RequestHttpService.cs

@@ -79,6 +79,18 @@ public class RequestHttpService : IRequestHttpService
         Thread.Sleep(1000);
         return await HandleResponse(response, uri);
     }
+    
+    public async Task<BaseResponse> DeleteByFilterAsync(string uri, object data, IDictionary<string, string>? headers = null)
+    {
+        headers ??= new Dictionary<string, string>();
+        var request = new HttpRequestMessage(HttpMethod.Delete, $"{_apiEndpoint}{uri}");
+        AddHeaders(request, headers);
+        request.Content = new StringContent(JsonSerializer.Serialize(data), Encoding.UTF8, "application/json");
+
+        var response = await _httpClient.SendAsync(request);
+        Thread.Sleep(1000);
+        return await HandleResponse(response, uri);
+    }
 
     private async void AddHeaders(HttpRequestMessage request, IDictionary<string, string>? headers)
     {