Initial commit: Brass & Sigil monorepo

Self-hosted Minecraft modpack distribution + administration system.

- launcher/  Avalonia 12 desktop client; single-file win-x64 publish.
             Microsoft auth via XboxAuthNet, manifest+SHA-1 mod sync,
             portable install path, sidecar settings.
- server/    brass-sigil-server daemon (.NET 8, linux-x64). Wraps the
             MC subprocess, embedded Kestrel admin panel with cookie
             auth + rate limiting, RCON bridge, scheduled backups,
             BlueMap CLI integration with player markers + skin proxy,
             friend-side whitelist request flow, world wipe with seed
             selection (keep current / random / custom).
- pack/      pack.lock.json (Modrinth + manual CurseForge entries),
             data-only tweak source under tweaks/, build outputs in
             overrides/ (gitignored).
- scripts/   Build-Pack / Build-Tweaks / Update-Pack / Check-Updates
             plus Deploy-Brass.ps1 unified one-shot deploy with
             version-bump pre-flight and daemon-state detection.

server/Commands/BaseCommandSettings.cs

@@ -0,0 +1,11 @@
+using System.ComponentModel;
+using Spectre.Console.Cli;
+
+namespace BrassAndSigil.Server.Commands;
+
+public class BaseCommandSettings : CommandSettings
+{
+    [CommandOption("-c|--config <PATH>")]
+    [Description("Path to server-config.json (defaults to ./server-config.json)")]
+    public string ConfigPath { get; set; } = "server-config.json";
+}