chore: remove startup message (use slip-status for help)

feat: add slip-tui for interactive sessions needing approvals

feat: add p10k custom segment for AI mode indicator

fix: let slip-cmd/slip-ai/fix pass through even in AI mode

feat: add slip-ai and slip-cmd commands for reliable mode switching

fix: change toggle to Ctrl+\ (Ctrl+G used by Gemini)

fix: change toggle to Ctrl+G (Ctrl+Space also conflicts)

fix: print spinner on separate line so it doesn't overwrite prompt

feat: add visible RPROMPT indicator for AI mode

fix: change mode toggle to Ctrl+Space (Ctrl+A conflicts with other bindings)

fix: accept-line handler not passing through to shell

fix: clear spinner line properly before output

feat: add slip-status command and mode toggle feedback

refactor: simplify zsh plugin - remove unreliable NL detection

feat: add timing info in verbose mode