Auto-build WASM packages on npm install via prepare hook (#304)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: secretrobotron

package.json

@@ -32,7 +32,7 @@
     "lint": "biome check .",
     "lint:fix": "biome check . --fix",
     "lint:summary": "biome check --reporter=summary",
-    "prepare": "",
+    "prepare": "npm run build:wasm",
     "site:build:relativeurls": "npm run build && npm run site:clean && node scripts/copy-site-files.js && mkdocs build && node scripts/rename-assets-to-static.js && node scripts/replace-urls.js",
     "site:build": "npm run build && npm run site:clean && node scripts/copy-site-files.js && mkdocs build && node scripts/rename-assets-to-static.js",
     "site:clean": "node scripts/clean-site-files.js && node scripts/clean-site.js",