Refactor Api-Client

Add Exceptionhandler, AlertService JSON-Converter
AppSettings via DI

Reformat Code

Jugenddienst Stunden/Interfaces/IApiClient.cs

@@ -0,0 +1,10 @@
+namespace Jugenddienst_Stunden.Interfaces;
+
+internal interface IApiClient {
+	Task<T> GetAsync<T>(string path, IDictionary<string, string?>? query = null, CancellationToken ct = default);
+
+	Task<T> SendAsync<T>(HttpMethod method, string path, object? body = null,
+		IDictionary<string, string?>? query = null, CancellationToken ct = default);
+
+	Task DeleteAsync(string path, IDictionary<string, string?>? query = null, CancellationToken ct = default);
+}