Move sync, bridge, notify, and doctor commands from cmd/edgesync/ into a new top-level cli/ package. The integration struct in cmd/edgesync/cli.go now imports from EdgeSync/cli (aliased as edgecli) and assembles the binary's command surface.

This mirrors libfossil/cli's pattern — the cli/ package exports embeddable Kong command structs that downstream consumers (e.g. agent-infra) can integrate alongside libfossil/cli.RepoCmd into their own unified CLI.

No behavior change: cmd/edgesync still builds the same binary with the same flags, and the existing notify_test.go end-to-end suite passes unchanged. check-in: 845d1d229e user: [email protected] tags: trunk