[backend/akko-client] Stub out just enough to allow Akkoma-FE to start

Iceshrimp.Backend/Controllers/Federation/NodeInfoController.cs

@@ -90,9 +90,34 @@ public class NodeInfoController(IOptions<Config.InstanceSection> config, Databas
 				MaxCaptionTextLength       = 0,
 				EnableGithubIntegration    = false,
 				EnableDiscordIntegration   = false,
-				EnableEmail                = false
+				EnableEmail                = false,
+
+				// TODO: STUB
+				PublicTimelineVisibility   = new() {
+					Bubble    = true,
+					Federated = true,
+					Local     = true,
+				},
+				UploadLimits = new() {
+					General = 50_000_000,
+					Avatar = 50_000_000,
+					Background = 50_000_000,
+					Banner = 50_000_000,
+				},
+				Suggestions = new() {
+					Enabled = false
+				},
+				Federation = new() {
+					Enabled = true
+				}
 			},
 			OpenRegistrations = false
 		};
 	}
+
+	[HttpGet("2.0.json")]
+	public IActionResult GetNodeInfoAkkoFE()
+	{
+		return Redirect("/nodeinfo/2.0");
+	}
 }

Iceshrimp.Backend/Controllers/Pleroma/FrontendController.cs

@@ -0,0 +1,26 @@
+using System.Net;
+using System.Net.Mime;
+using Iceshrimp.Backend.Controllers.Mastodon.Attributes;
+using Iceshrimp.Backend.Controllers.Pleroma.Schemas;
+using Iceshrimp.Backend.Controllers.Shared.Attributes;
+using Iceshrimp.Backend.Core.Configuration;
+using Microsoft.AspNetCore.Cors;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.RateLimiting;
+using Microsoft.Extensions.Options;
+
+namespace Iceshrimp.Backend.Controllers.Pleroma;
+
+[MastodonApiController]
+[EnableCors("mastodon")]
+[EnableRateLimiting("sliding")]
+[Produces(MediaTypeNames.Application.Json)]
+public class FrontendController : ControllerBase
+{
+	[HttpGet("/api/v1/pleroma/frontend_configurations")]
+	[ProducesResults(HttpStatusCode.OK)]
+	public FrontendConfigurationsResponse GetFrontendConfigurations([FromServices] IOptionsSnapshot<Config> config)
+	{
+		return new FrontendConfigurationsResponse();
+	}
+}

Iceshrimp.Backend/Controllers/Pleroma/Schemas/FrontendConfigurationsResponse.cs

@@ -0,0 +1,14 @@
+using J = System.Text.Json.Serialization.JsonPropertyNameAttribute;
+
+namespace Iceshrimp.Backend.Controllers.Pleroma.Schemas;
+
+public class FrontendConfigurationsResponse()
+{
+    [J("pleroma_fe")] public PleromaFeConfiguration PleromaFe => new();
+}
+
+
+// TODO: STUB
+public class PleromaFeConfiguration()
+{
+}

Iceshrimp.Backend/Core/Federation/WebFinger/Types.cs

@@ -110,6 +110,46 @@ public class NodeInfoResponse
 		[J("enableGithubIntegration")]    public bool?         EnableGithubIntegration    { get; set; }
 		[J("enableDiscordIntegration")]   public bool?         EnableDiscordIntegration   { get; set; }
 		[J("enableEmail")]                public bool?         EnableEmail                { get; set; }
+
+		[J("publicTimelineVisibility")]   public PleromaPublicTimelineVisibility? PublicTimelineVisibility { get; set; }
+		[J("features")]                   public PleromaFeature[]          Features                 { get; set; } = [];
+		[J("uploadLimits")]   public PleromaUploadLimits? UploadLimits { get; set; }
+		[J("suggestions")]   public PleromaSuggestions? Suggestions { get; set; }
+		[J("federation")]   public PleromaFederation? Federation { get; set; }
+		[J("localBubbleInstances")]   public string[] LocalBubbleInstances { get; set; } = [];
+		
+		// TODO: list of ap object ids i believe?
+		[J("staffAccounts")]   public string[] StaffAccounts { get; set; } = [];
+	}
+
+	public enum PleromaFeature
+	{
+
+	}
+
+	public class PleromaPublicTimelineVisibility
+	{
+		[J("bubble")]    public bool? Bubble    { get; set; }
+		[J("federated")] public bool? Federated { get; set; }
+		[J("local")]     public bool? Local     { get; set; }
+	}
+
+	public class PleromaUploadLimits
+	{
+		[J("general")]    public int? General   { get; set; }
+		[J("avatar")]    public int? Avatar { get; set; }
+		[J("background")]    public int? Background { get; set; }
+		[J("banner")]    public int? Banner { get; set; }
+	}
+
+	public class PleromaSuggestions
+	{
+		[J("enabled")]    public bool? Enabled { get; set; }
+	}
+
+	public class PleromaFederation
+	{
+		[J("enabled")]    public bool? Enabled { get; set; }
 	}
 
 	public class Maintainer