Adds JetBrains.Annotations to reduce amount of false positives by static code analysis

src/Web/Features/Contents/Handlers/GetContent.cs

@@ -1,14 +1,14 @@
-using FastEndpoints;
-using Hutopy.Web.Features.Contents.Data;
-using Microsoft.EntityFrameworkCore;
+using Hutopy.Web.Features.Contents.Data;
 
 namespace Hutopy.Web.Features.Contents.Handlers;
 
+[PublicAPI]
 public sealed class GetContentRequest
 {
     public Guid ContentId { get; set; }
 }
 
+[PublicAPI]
 public class GetContent(
     ContentDbContext context)
     : Endpoint<GetContentRequest, Content>