Clarify build:worker script to use bundle analyzer

- build:worker now uses worker.compile.ts (shows real size with WASM)
- build:worker:bun added for raw Bun build (JS only, faster)

This avoids confusion: Bun's 435KB excludes WASM, real bundle is 585KB

Author: max-lt

package.json

@@ -13,7 +13,8 @@
     "dev": "bun --hot src/index.ts",
     "start": "bun src/index.ts",
     "compile": "bun build --compile --minify --sourcemap server.ts --outfile dist/openworkers-api",
-    "build:worker": "bun build --minify --sourcemap --target=browser worker.ts --outdir dist",
+    "build:worker": "bun worker.compile.ts",
+    "build:worker:bun": "bun build --minify --sourcemap --target=browser worker.ts --outdir dist",
     "test": "bun test",
     "check": "tsc --noEmit",
     "lint": "prettier --write .",