p2p module

This release is the first version with p2p code merged in. There's still numerous things to change, but should be able to run on its own by now.

What's Changed

• Create rust.yml by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/7
• Update readme.md by @kcalvinalvin in https://github.com/Davidson-Souza/Floresta/pull/4
• Handle reorgs by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/8
• Fix a bug with descriptor caching by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/9
• Feature/test framework by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/10
• Cache individual addresses by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/11
• P2p chain by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/12
• implement all electrum protocol by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/13
• A few bugfixes by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/14
• Remove debug print by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/17
• Optmize Dockerfile by @jaonoctus in https://github.com/Davidson-Souza/Floresta/pull/18
• Minor fixups by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/19
• Persist peers db by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/20
• Add transaction broadcast logic by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/21
• A few teaks on electrum implementation by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/23
• Docs by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/24
• Bump version by @Davidson-Souza in https://github.com/Davidson-Souza/Floresta/pull/25

Full Changelog: Davidson-Souza/Floresta@0.1.0...0.3.0