Dapp interaction with eth_sendTransaction rpc call

[kautukkundan]

What is this PR doing?

Adds eth_sendTransaction rpc endpoint to the QuillController which enables connections with any generic dapp without modification.

What should work -

• Connection with injected provider
• sending transactions / sending ETH (externally via a dapp)

[DEMO] Sending eth
https://user-images.githubusercontent.com/23727056/161533589-70f330b8-0493-4d44-b9e0-0401737a3d30.mov

[DEMO] Contract Interaction
https://user-images.githubusercontent.com/23727056/161534683-fbc2ffb0-7fde-4a45-977b-7eb65a2cbd48.mov

What won't work -

• Transaction confirmations - Since Aggregator does not return transaction receipt Return Transaction hash from Aggregator #178 , eth_getTransactionReceipt cannot query for the same Create rpc endpoint eth_getTransactionReceipt #179
• Popup for confirmation - need to add UI for popup confirmation UI: Create popup for tx confirmation #180
• Can only connect and interact with dapp using the default account Change accounts via popup for dapp interaction #181
• Contract creation Add Contract deployment support #182
• Can only send 1 action for the moment Send multiple actions in a single tx  #184

How can these changes be manually tested?

Pull changes, import extension and test with a dapp

Does this PR resolve or contribute to any issues?

closes #67

Checklist

• I have manually tested these changes
• Post a link to the PR in the group chat

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