v0.8 [3/4]: CLI subcommands + hook template

[ashu17706]

Part of #71. The user-facing surface — what an engineer actually types.

Scope

New `smriti daemon` subcommands in `src/index.ts`

• `smriti daemon` — run the daemon in foreground (debugging, systemd target). Imports from `src/daemon/server.ts`
• `smriti daemon install` — calls `src/daemon/install.ts`. Writes the appropriate service file and registers it
• `smriti daemon uninstall` — reverses install
• `smriti daemon status` — connect to socket, print: PID, uptime, pending project queues, last ingest timestamp per project. Falls back to PID-file inspection if socket is unresponsive
• `smriti daemon stop` — graceful shutdown via socket message; falls back to PID-file SIGTERM after 2s
• `smriti daemon logs` — tail `~/.cache/smriti/daemon.log` (`tail -f` semantics, Ctrl-C to exit)

Hook template update

• Update the `save-memory.sh` template documented in `CLAUDE.md` to the poke-with-fallback form:
  ```bash
  #!/bin/bash
  SOCK="$HOME/.cache/smriti/daemon.sock"
  if [ -S "$SOCK" ]; then
  : | nc -U "$SOCK" 2>/dev/null
  else
  /usr/bin/lockf -t 0 /tmp/smriti-ingest.lock smriti ingest claude 2>/dev/null
  fi
  exit 0
  ```

First-run UX

• If user runs `smriti search` / `smriti recall` and the daemon isn't installed, show a one-line nudge: "💡 `smriti daemon install` keeps your sessions auto-captured across agents." Show once per session, suppress with `SMRITI_NO_NUDGE=1`

Acceptance

• `smriti daemon --help` shows all six subcommands with clear descriptions
• All commands work when daemon is running and when it isn't (where applicable)
• The hook template change is documented in `CLAUDE.md`'s quick reference
• The first-run nudge appears exactly once and respects the suppression env var

Out of scope

• Daemon core (v0.8 [1/4]: Daemon core — server, watcher, queue, handlers #72)
• Service installer internals (v0.8 [2/4]: Service installer — LaunchAgent + systemd-user #73)
• Tests (v0.8 [4/4]: Tests + release readiness #75)