Initial commit: SSH MUD server with data-driven world

Rust-based MUD server accepting SSH connections on port 2222.
Players connect with any SSH client, get dropped into a
data-driven world loaded from TOML files at startup.

Binary systems: SSH handling (russh), command parser, game state,
multiplayer broadcast, ANSI terminal rendering.

Data layer: world/ directory with regions, rooms, NPCs, and objects
defined as individual TOML files — no recompile needed to modify.

Commands: look, movement (n/s/e/w/u/d), say, who, help, quit.
Made-with: Cursor

Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "mudserver"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+russh = { version = "0.54", default-features = false, features = ["ring"] }
+tokio = { version = "1", features = ["full"] }
+serde = { version = "1", features = ["derive"] }
+toml = "0.8"
+log = "0.4"
+env_logger = "0.11"