[backend/web] Add version endpoint

Iceshrimp.Backend/Controllers/Web/VersionController.cs

@@ -0,0 +1,33 @@
+using System.Net;
+using System.Net.Mime;
+using Iceshrimp.Backend.Controllers.Shared.Attributes;
+using Iceshrimp.Backend.Core.Middleware;
+using Iceshrimp.Shared.Helpers;
+using Iceshrimp.Shared.Schemas.Web;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.RateLimiting;
+
+namespace Iceshrimp.Backend.Controllers.Web;
+
+[ApiController]
+[Authenticate]
+[EnableRateLimiting("sliding")]
+[Route("/api/iceshrimp/version")]
+[Produces(MediaTypeNames.Application.Json)]
+public class VersionController : ControllerBase
+{
+	[HttpGet]
+	[ProducesResults(HttpStatusCode.OK)]
+	public Task<VersionResponse> GetVersion()
+	{
+		var version = VersionHelpers.GetVersionInfo();
+		return Task.FromResult(new VersionResponse
+		{
+			Codename   = version.Codename,
+			CommitHash = version.CommitHash,
+			Edition    = version.Edition,
+			Version    = version.Version,
+			RawVersion = version.RawVersion
+		});
+	}
+}

Iceshrimp.Shared/Schemas/Web/VersionResponse.cs

@@ -0,0 +1,10 @@
+namespace Iceshrimp.Shared.Schemas.Web;
+
+public class VersionResponse
+{
+	public required string  Codename   { get; set; }
+	public required string  Edition    { get; set; }
+	public required string? CommitHash { get; set; }
+	public required string  RawVersion { get; set; }
+	public required string  Version    { get; set; }
+}