* feat: base implementation of dcutr for hole-punching
* chore: removed circuit-relay imports from __init__
* feat: implemented dcutr protocol
* added test suite with mock setup
* Fix pre-commit hook issues in DCUtR implementation
* usages of CONNECT_TYPE and SYNC_TYPE have been replaced with HolePunch.Type.CONNECT and HolePunch.Type.SYNC
* added unit tests for dcutr and nat module and
* added multiaddr.get_peer_id() with proper DNS address handling and fixed method signature inconsistencies
* added assertions to verify DCUtR hole punch result in integration test
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Co-authored-by: Manu Sheel Gupta <manusheel.edu@gmail.com>
