fix(discord): register slash command modules

Register NetCord application command modules after the host is built so module-based commands are published alongside the minimal /ping command.

Update README Discord env guidance to avoid the unused DISCORD_BOT_CLIENT_ID variable.

Bump version to 3.0.2.

src/GmRelay.DiscordBot/Program.cs

@@ -18,6 +18,7 @@ using Microsoft.Extensions.DependencyInjection;
 using NetCord;
 using NetCord.Gateway;
 using NetCord.Hosting.Gateway;
+using NetCord.Hosting.Services;
 using NetCord.Hosting.Services.ApplicationCommands;
 using NetCord.Hosting.Services.ComponentInteractions;
 using NetCord.Services.ComponentInteractions;
@@ -89,5 +90,6 @@ builder.Services
 var host = builder.Build();
 
 host.AddSlashCommand("ping", "Checks whether GM-Relay Discord is online.", () => "Pong!");
+host.AddModules(typeof(Program).Assembly);
 
 await host.RunAsync();

src/GmRelay.Web/Components/Layout/NavMenu.razor

@@ -73,7 +73,7 @@
                     </button>
                 </form>
 
-                <div class="nav-version">v3.0.1</div>
+                <div class="nav-version">v3.0.2</div>
             </div>
         </Authorized>
         <NotAuthorized>