Refactor project files for improved readability and structure

- Cleaned up whitespace in Directory.Build.props and Directory.Packages.props for consistency.
- Reformatted project file references in PnvPanel.Api.csproj for better clarity.
- Enhanced code readability in various endpoint files by adjusting line breaks and indentation.
- Standardized method signatures and improved formatting in ResultExtensions and multiple endpoint classes for better maintainability.

backend/tests/PnvPanel.IntegrationTests/TestSupport/HttpClientJsonExtensions.cs

@@ -8,15 +8,24 @@ public static class HttpClientJsonExtensions
 {
     public static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web);
 
-    public static void UseBearerToken(this HttpClient client, string accessToken)
-        => client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
+    public static void UseBearerToken(this HttpClient client, string accessToken) =>
+        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
+            "Bearer",
+            accessToken
+        );
 
-    public static async Task<T?> ReadAsAsync<T>(this HttpResponseMessage response)
-        => await response.Content.ReadFromJsonAsync<T>(JsonOptions);
+    public static async Task<T?> ReadAsAsync<T>(this HttpResponseMessage response) =>
+        await response.Content.ReadFromJsonAsync<T>(JsonOptions);
 
-    public static Task<HttpResponseMessage> PostJsonAsync(this HttpClient client, string url, object body)
-        => client.PostAsJsonAsync(url, body, JsonOptions);
+    public static Task<HttpResponseMessage> PostJsonAsync(
+        this HttpClient client,
+        string url,
+        object body
+    ) => client.PostAsJsonAsync(url, body, JsonOptions);
 
-    public static Task<HttpResponseMessage> SendPutJsonAsync(this HttpClient client, string url, object body)
-        => client.PutAsJsonAsync(url, body, JsonOptions);
+    public static Task<HttpResponseMessage> SendPutJsonAsync(
+        this HttpClient client,
+        string url,
+        object body
+    ) => client.PutAsJsonAsync(url, body, JsonOptions);
 }