Bump version to 0.3.0

Breaking: Hero removed, proxy modes renamed (standard/premium),
connectionToCore removed, IBrowserPool exports removed.

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

Author: nihalwashere

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vakra-dev/reader",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "Open source, production grade web scraping engine for LLMs. Clean markdown output, ready for your agents.",
   "license": "Apache-2.0",
   "type": "module",