add a bunch of stuff copied from Foxchat.NET

Foxnouns.Backend/Controllers/UsersController.cs

@@ -0,0 +1,32 @@
+using System.Diagnostics;
+using Foxnouns.Backend.Database;
+using Foxnouns.Backend.Middleware;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Foxnouns.Backend.Controllers;
+
+[Route("/api/v2/users")]
+public class UsersController(DatabaseContext db) : ApiControllerBase
+{
+    [HttpGet("{userRef}")]
+    public async Task<IActionResult> GetUser(string userRef)
+    {
+        var user = await db.ResolveUserAsync(userRef);
+        return Ok(user);
+    }
+
+    [HttpGet("@me")]
+    [Authorize("identify")]
+    public Task<IActionResult> GetMe()
+    {
+        throw new NotImplementedException();
+    }
+
+    [HttpPatch("@me")]
+    public Task<IActionResult> UpdateUser([FromBody] UpdateUserRequest req)
+    {
+        throw new NotImplementedException();
+    }
+
+    public record UpdateUserRequest(string? Username, string? DisplayName);
+}