feat: initial implementation

[wemeetagain]

TODO:

• [x] test window update functionality
• [x] add features implied by the config object
• [x] address open TODOs
• [x] add a README
• [x] update it-pushable
• [x] update interfaces
• [ ] better metrics
• [ ] interop testing with go

[wemeetagain]

Interop testing is blocked by https://github.com/libp2p/js-libp2p/pull/1305 and https://github.com/libp2p/js-libp2p-mplex/pull/211

[dapplion]

Ok from me to merge :+1: no point on sitting on this for longer. Fixes can be done after the fact

[wemeetagain]

Ok merging this and will cut an initial release. When we have more real-world testing done we can bump to 1.0.0

[github-actions[bot]]

:tada: This PR is included in version 1.0.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: