feat: add multiplayer session support with ENet host/join

src/Features/Console/Application/Commands/HostCommand.cs

@@ -0,0 +1,29 @@
+using System.Collections.Generic;
+using Game.Features.Console.Contracts;
+using Game.Features.Multiplayer.Contracts;
+using Game.Features.Multiplayer.Contracts.Exceptions;
+
+namespace Game.Features.Console.Application.Commands;
+
+public sealed class HostCommand(IMultiplayerPeer multiplayer) : ICommand
+{
+    public string Name => "host";
+    public string Description => "Starts hosting a multiplayer session on the given port.";
+    public IReadOnlyList<CommandArgSpec> Args { get; } = new CommandArgsBuilder().AddIntArg("port").Build();
+
+    public CommandResult Execute(CommandArgValues args)
+    {
+        int port = args.GetInt(0);
+
+        try
+        {
+            multiplayer.Host(port);
+        }
+        catch (MultiplayerException ex)
+        {
+            return CommandResult.Fail(ex.Message);
+        }
+
+        return CommandResult.Ok($"Hosting on port {port}.");
+    }
+}

src/Features/Console/Application/Commands/HostCommand.cs.uid

@@ -0,0 +1 @@
+uid://crmnspnxcut3y

src/Features/Console/Application/Commands/JoinCommand.cs

@@ -0,0 +1,35 @@
+using System.Collections.Generic;
+using Game.Features.Console.Contracts;
+using Game.Features.Multiplayer.Contracts;
+using Game.Features.Multiplayer.Contracts.Exceptions;
+
+namespace Game.Features.Console.Application.Commands;
+
+public sealed class JoinCommand(IMultiplayerPeer multiplayer) : ICommand
+{
+    private const string AddressPattern =
+        @"^(localhost|((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))$";
+
+    public string Name => "join";
+    public string Description => "Joins a multiplayer session at the given address and port.";
+
+    public IReadOnlyList<CommandArgSpec> Args { get; } =
+        new CommandArgsBuilder().AddRegexArg("address", AddressPattern).AddIntArg("port").Build();
+
+    public CommandResult Execute(CommandArgValues args)
+    {
+        string address = args.GetString(0);
+        int port = args.GetInt(1);
+
+        try
+        {
+            multiplayer.Join(address, port);
+        }
+        catch (MultiplayerException ex)
+        {
+            return CommandResult.Fail(ex.Message);
+        }
+
+        return CommandResult.Ok($"Connecting to {address}:{port}...");
+    }
+}

src/Features/Console/Application/Commands/JoinCommand.cs.uid

@@ -0,0 +1 @@
+uid://c80rskv3u7su7