For now this simplifies the API (because we are only supporting local
sync, not remote sync over the internet) to:

- `project.$sync.getState()`
- `project.$sync.start()`
- `project.$sync.stop()`
- Events
    - `sync-state`

It's currently not possible to stop local discovery, nor is it possible
to stop sync of the metadata namespaces (auth, config, blobIndex). The
start and stop methods stop the sync of the data and blob namespaces.

Fixes #134. Stacked on #360, #358 and #356.

Fixes Add project method to download auth + config cores #233

Rather than call this inside the `client.addProject()` method, instead I
think it is better for the API consumer to call
`project.$waitForInitialSync()` after adding a project, since this
allows the implementer to give user feedback about what is happening.

This was a big lift, but necessary to be able to debug sync issues since
temporarily adding console.log statements was too much work, and
debugging requires knowing the deviceId associated with each message.

This caused a day of work: a bug from months back

* main:
  feat: add `$sync` API methods (#361)
  feat: `listLocalPeers()` & `local-peers` event (#360)
  feat: integrate LocalDiscovery & LocalPeers (#358)
  implement IconApi (#335)
  feat: MapeoRPC -> LocalPeers (#356)
  chore: update @mapeo/schema and @mapeo/sqlite-indexer (#357)

Removes old replication code attached to CoreManager
Still needs tests to be updated

* main:
  implement media server (#365)
  feat: implement icon server plugin (#315)
  fix: fix core storage initialization in MapeoManager (#367)

* chore/add-logging:
  chore: Add debug logging

* main:
  fix: fix writing to blob store when also calculating content hash (#370)
  integrate icon plugin into MediaServer (#369)

* fix/local-peers:
  new tests for duplicate connections
  fixed fake timers implementation for tests
  send invite to non-existent peer
  fix stream close before channel open
  fix: handle duplicate connections to LocalPeers
  fix: fix writing to blob store when also calculating content hash (#370)
  integrate icon plugin into MediaServer (#369)
  chore: Add debug logging (#373)

Reduces the number of duplicate requests for the same keys.

Turns out this changes how core.length etc. work, which confuses things

* main:
  chore: pin more hyper deps (#381)
  chore: extract and test construction of icon url (#366)
  chore: fix release workflow configuration (#379)
  chore: remove unused/unneeded deps (#376)
  chore: remove authstore (#377)
  fix: handle duplicate connections to LocalPeers (#378)

This is now tested in e2e tests

* main:
  chore: fix Brittle type definitions (#383)
  feat: dbMigrationPathOpt - add db migration path to `MapeoProject` and `MapeoManager` (#384)
  [OPTIC-RELEASE-AUTOMATION] release/v9.0.0-alpha.2 (#382)

This test relied on `peer.connectedAt` changing in order to distinguish
connections, but sometimes `connectedAt` was the same for both peers.
This adds a 1ms delay before making the second connection, to attempt to
stop the flakiness.

* main:
  feat: remove project.ready() (#392)
  feat: integrate sync and project invites (#362)