fix(logger): remove prepublishOnly script that breaks workspace publish

The prepublishOnly script runs tsdown individually during pnpm -r publish,
but tsdown workspace mode fails after devExports has already modified
package.json files. The root pnpm build already builds all packages
including logger, so prepublishOnly is unnecessary.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: killagu

packages/logger/package.json

@@ -38,7 +38,6 @@
   "scripts": {
     "build": "tsdown",
     "clean": "rimraf dist",
-    "prepublishOnly": "npm run build",
     "lint": "oxlint --type-aware",
     "typecheck": "tsgo --noEmit",
     "test": "vitest run"