Tracking issue for RFC 696

[xla]

• [ ] Remove connected_peers from the librad::net::protocol::event::downstream::Stats cf: https://github.com/radicle-dev/radicle-link/pull/696#discussion_r661294767
• [ ] Introduce introspection once cli and node are more stable https://github.com/radicle-dev/radicle-link/pull/696#discussion_r662955227
• [ ] Follow-up RFC for management of daemon service files tight to profile lifecycles https://github.com/radicle-dev/radicle-link/pull/696#discussion_r662135719
• [ ] Design and propose a dynamic API for changing tracked URNs https://github.com/radicle-dev/radicle-link/pull/696/files#r699792462
• [ ] Remove seed crate cf: https://github.com/radicle-dev/radicle-link/pull/696#discussion_r661330088
• [ ] Remove daemon crate

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• [ ] systemd support
  • [x] implement socket activation
  • [x] test socket activation
  • [ ] add service definition templates
• [ ] launchd support
  • [ ] implement socket activation
  • [ ] test socket activation
  • [ ] add service definition templates
• [ ] run peer
  • [x] drive network protocol
  • [x] ensure rebinding
  • [x] ensure graceful shutdown
  • [x] get read&write access on behalf of current profile
  • [x] provide tincans to subroutines
  • [ ] expose config knobs via cli params
• [ ] protocols
  • [ ] announcements
  • [ ] implement protocol
  • [ ] implement subroutine
  • [ ] expose config via cli params
  • [ ] API
    • [ ] implement protocol
    • [ ] implement subroutine
    • [ ] expose config via cli params
    • [ ] implement auto-shutdown once last connection is closed
  • [ ] replication requests
  • [ ] implement protocol
  • [ ] implement subroutine
  • [ ] expose config via cli params
  • [x] tracking
  • [x] implemnt protocol
  • [x] implement subroutine
  • [x] expose config via cli params
• [ ] API lib
  • [ ] implement request-response payloads
  • [ ] implement payload serialisation
  • [ ] implement RPC client
  • [ ] implement RPC server on UNIX domain socket
• [ ] expose knobs for logging/tracing
• [ ] metrics
  • [ ] implement prometheus metrics
  • [ ] expose internals (tasks, etc.)
• [ ] documentation
  • [ ] generate man pages

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Blocking issues/PRs:

• [x] https://github.com/radicle-dev/radicle-link/issues/141