feat: add browser automation commands (v0.6.0)

Navigation: open-wait (open + block until loaded)
DOM: key, hover, check/uncheck, clear, focus, submit, poll, scroll, select, eval, wait-for
Tabs: pin/unpin, screenshot, watch-url (block until URL matches regex)
New command groups: page info, storage get/set, cookies list/get/set
Extension: add cookies permission

browser_cli/cli.py

@@ -21,6 +21,9 @@ from browser_cli.commands.dom import dom_group
 from browser_cli.commands.extract import extract_group
 from browser_cli.commands.session import session_group
 from browser_cli.commands.search import search_group
+from browser_cli.commands.page import page_group
+from browser_cli.commands.storage import storage_group
+from browser_cli.commands.cookies import cookies_group
 from browser_cli.client import (
     send_command,
     BrowserNotConnected,
@@ -179,6 +182,9 @@ main.add_command(dom_group)
 main.add_command(extract_group)
 main.add_command(session_group)
 main.add_command(search_group)
+main.add_command(page_group)
+main.add_command(storage_group)
+main.add_command(cookies_group)
 
 
 # ── clients ────────────────────────────────────────────────────────────────────