me-web? skeleton: Avalonia 12 app, server, packaging and CI

The first screen (online or not, a Check button, every language with a
draft notice), the desktop and Android heads, the server's /api/info and
/api/ip, a release tool that builds deb, rpm, a Windows exe, macOS zips,
a signed APK and the server, and the Gitea workflows that run it. Rules
adapted from passolo; AGPL-3.0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

src/MeWeb.App/AppServices.cs

@@ -0,0 +1,22 @@
+using MeWeb.App.Services;
+using MeWeb.App.ViewModels;
+using MeWeb.Shared;
+
+using Microsoft.Extensions.DependencyInjection;
+
+namespace MeWeb.App;
+
+public static class AppServices
+{
+  public static IServiceCollection AddMeWebApp(this IServiceCollection services)
+  {
+    services.AddHttpClient(ServerClient.Name, http =>
+    {
+      http.BaseAddress = new Uri(Endpoints.Base);
+      http.DefaultRequestHeaders.UserAgent.ParseAdd($"me-web/{BuildInfo.Version}");
+    });
+    services.AddSingleton<ServerClient>();
+    services.AddTransient<MainViewModel>();
+    return services;
+  }
+}