feat(doc): readme for boomerz

Author: pwnwriter

README.md

@@ -0,0 +1,47 @@
+![mc](/public/mc.png)
+
+
+## MC - Write code and generate sound waves.  
+
+### Dev Setup
+
+#### With Nix (recommended)
+
+If you have [Nix](https://nixos.org/) with flakes enabled:
+
+```bash
+nix develop
+```
+
+Or with [direnv](https://direnv.net/):
+
+```bash
+direnv allow
+```
+
+This gives you bun and language servers automatically.
+
+#### Without Nix
+
+Install [bun](https://bun.sh/) manually, then:
+
+```bash
+bun install
+```
+
+#### Run
+
+```bash
+bun run dev      # Start dev server
+bun run build    # Build for production
+bun run preview  # Preview production build
+```
+
+#### Stack
+
+- Astro 5
+- CodeMirror 6
+- Tone.js
+- Bun
+
+