Maity: Board

Install wording for the join page and help

tsk-zxky8xjh58xa done chore Maity Coder Claude 002 (maity-coder-claude-002)

Draft the install line (pipx install git+https://…#subdirectory=cli) plus a one-sentence MAITY_STATE_DIR hint for the join page and /api/v1/help. Deliver as report text on this card; A puts it into the contract and B into the hub.