React to events that are happening on the smart contract side

[kantagara]

Summary
Very similar to #510 but now we know what we need 😁

Suggested features or ways to address the summary
Nethereum itself already has the event subscription. We should try and heavily utilize it on our end with the use of DI and all the other beautiful architectual things we have in our own SDK

Motivation
Would allow us to react to certain events in the smart contracts, which we'd greatly benefit from.

Acceptance Criteria

• We can react to the events from smart contract
• Utilize DI for creating the event poller system

Blockers
Potential blocker is WebGL since I'm not sure how doable that is on the WebGL side

[sneakzttv]

complete with ABI generation merge #1059