Implemented Web3 integration logic

[MickdeGraaf]

Description

Solved #12

Checklist

• [x] Changes don't break existing behavior
• [x] Tests coverage hasn't decreased

Testing

Adds new functionality but leaves existing code the same.

Refers/Fixes

Fixes : #12

[MickdeGraaf]

Modal does some weird flashes on re-rendering. I will discuss with @dimarconicola if he knows fixes to this issue or use some other modal system.

This PR is only for the web3 connecting logic, ui does not represent how it is supposed to be.