PPPs #2 - Zerologin mobile app: Generate/Import mnemonic + Android

Plans 📆

Probably nothing. I have planned to work on my second project Una-connect (see the first PPP)

Progress ✅

I made the generation and restoration from a mnemonic when launching app for the first time.

UI is not perfect but here is some screenshots

Problems ✋

I launched the Android version of my app for the first time this week and... there was a lot of problems because of @scure/bip32 and 39 libraries. These libraries use BigNumber which are not supported by React native android (it should be fixed with RN v70 soon...). The easiest solution was to switch @scure libraries to bitcoinjs bip32 and bip39. There was some polyfills to create to make them work, but it works now.