Feat/p2p discovery layer

[aimendj]

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Unit Test Results

       5 files  ±    0     685 suites  +20   1m 31s ⏱️ +26s
   622 tests +  26     616 ✔️ +  33    6 💤  -   7  0 ❌ ±0 
3 270 runs  +130  3 240 ✔️ +165  30 💤  - 35  0 ❌ ±0 

Results for commit 5205b9c. ± Comparison against base commit a90edc8.

This pull request removes 1 and adds 27 tests. Note that renamed tests count towards both.

Bootstrap multiaddr: parseBootstrapAddress accepts /dns4/.../udp/.../quic-v1/p2p/...

AddressBook extend merges multiaddrs without duplicates
Bootstrap multiaddr: loadBootstrapNodes accepts /dns4/.../udp/.../quic-v1/p2p/...
connectViaConnQueue: bootstrap-style integration connects a live peer
connectViaConnQueue: multiple concurrent callers coalesce and all resolve true
connectViaConnQueue: timeout marks peer seen and does not hang
connectWorker: in-flight dial transitions to Dialing stage and clears after failure
connected peers are admitted to peerPool with Connected state upon libp2p connection
enqueueKadDiscoveredPeers respects rtable, AddressBook, and peer pool
enqueueKadDiscoveredPeers: nil Kad returns (0, 0)
kadBootstrap: dials bootstrap nodes and runs lookup on success
…

♻️ This comment has been updated with latest results.