feat: add console command framework

src/Features/Console/Contracts/CommandArgSpec.cs

@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+
+namespace Game.Features.Console.Contracts;
+
+public sealed record CommandArgSpec(string Name, CommandArgType Type, IReadOnlyList<string> Choices = null)
+{
+    public override string ToString() =>
+        Type == CommandArgType.Choice && Choices is not null
+            ? string.Join("|", Choices)
+            : Type.ToString().ToLowerInvariant();
+}