Revert "[be] add example endpoint"

This reverts commit 7b5bc202db5f31b7e3fef198468afca61b8fac4a.

(yeah fastendpoints doesn't fit atproto so I decided to make my own)

AtmoType/AtmoType.csproj

···
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="FastEndpoints" Version="7.1.1" />
     <PackageReference Include="FishyFlip" Version="4.2.0" />
   </ItemGroup>
 

AtmoType/Endpoints/Example/Example.cs

···
-namespace AtmoType.Endpoints.Example;
-
-public class ExampleRequest
-{
-    public string? Name { get; set; }
-}
-
-public class ExampleResponse
-{
-    public string Hello { get; set; } = string.Empty;
-}
-
-public class Example : XrpcQuery<ExampleRequest, ExampleResponse>
-{
-    public override string Nsid => "win.atmotype.example.example";
-
-    public override async Task<ExampleResponse> ExecuteAsync(ExampleRequest req, CancellationToken ct)
-    {
-        return new ExampleResponse
-        {
-            Hello = "world"
-        };
-    }
-}

AtmoType/Program.cs

···
-using FastEndpoints;
-
 var builder = WebApplication.CreateBuilder(args);
-builder.Services.AddFastEndpoints();
 var app = builder.Build();
 
-app.UseFastEndpoints();
 app.MapGet("/", () => "Hello World!");
+
 app.Run();

AtmoType/XrpcBase.cs

···
-using FastEndpoints;
-
-namespace AtmoType;
-
-public abstract class XrpcQuery<TRequest, TResponse> : Endpoint<TRequest, TResponse>
-    where TRequest : notnull
-    where TResponse : notnull
-{
-    public abstract string Nsid { get; }
-
-    public override void Configure()
-    {
-        Get($"/xrpc/{Nsid}");
-        AllowAnonymous(); // TODO: Better auth support
-    }
-}
-
-public abstract class XrpcProcedure<TRequest, TResponse> : Endpoint<TRequest, TResponse>
-    where TRequest : notnull
-    where TResponse : notnull
-{
-    public abstract string Nsid { get; }
-
-    public override void Configure()
-    {
-        Post($"/xrpc/{Nsid}");
-        AllowAnonymous(); // TODO: Better auth support
-    }
-}