memmy CLI

Command	Description
`memmy`	Start an interactive chat
`memmy onboard`	Initialize config and workspace
`memmy onboard --wizard`	Terminal menu-driven setup
`memmy status`	Check config, workspace, model, and provider status
`memmy agent --message "..."`	Send a single-turn message
`memmy serve`	Start the OpenAI-compatible API
`memmy provider login <provider>`	Provider OAuth sign-in