Add Go CDN and playground server

Build Core and Handles into in-memory CDN modules, add the marketing site and tutorial docs, and provide a SQLite-backed WebGPU playground with TypeScript tooling and profiling.

Amp-Thread-ID: https://ampcode.com/threads/T-01a02485-5574-707c-bff4-5668d83bee8a
Co-authored-by: Heaust Azure <heaust.azure@gmail.com>

package.json

@@ -3,9 +3,13 @@
   "version": "0.1.0",
   "private": true,
   "type": "module",
-  "workspaces": ["core", "addons/*"],
+  "workspaces": [
+    "core",
+    "addons/*"
+  ],
   "scripts": {
     "start": "wasm-pack build core --target web --out-dir pkg --release && vitepress dev docs --host 0.0.0.0 --port ${PORT:-8080}",
+    "server": "go run ./server",
     "coredocs": "vitepress dev coredocs --host 0.0.0.0 --port ${PORT:-8080}",
     "build:coredocs": "vitepress build coredocs"
   },
@@ -13,6 +17,8 @@
     "@codemirror/lang-javascript": "^6.2.5",
     "@codemirror/theme-one-dark": "^6.1.3",
     "codemirror": "^6.0.2",
+    "esbuild": "^0.25.9",
+    "monaco-editor": "^0.52.2",
     "vitepress": "^1.6.4"
   }
 }