pocket v0.1.2

fixes from the first real installs.

• codex: works again. codex removed the old api format pocket used, which stopped codex from starting. pocket now speaks codex's current responses api (tools, apply_patch, mcp tools)
• codex: attach only adds a separate pocket profile. plain codex and the chatgpt app are never touched; codex-pocket goes through pocket
• claude-pocket / codex-pocket now work right after npm i -g, no PATH setup
• clear message when claude code or codex isn't installed
• pocket doctor flags codex configs left by 0.1.1

upgrading from 0.1.1:
pocket daemon stop
npm i -g @zerwone/pocket@latest
pocket detach codex (if you attached it)
pocket detach claude
pocket attach claude