[roles-0.2.0/streams] - Now the payroll is getting real baby

[mudrila]

This PR adds ability to add a payroll stream to an existing hat or newly added hat when tree is present
That means it will only work when roles were added before!

Testing:

1. Create brand new Safe. Fund it with some ERC-20 to use for Payroll.
2. Create a proposal to initialize Hats Tree (aka create 1 hat without a payroll)
3. Execute that proposal
4. Edit that hat - add a payroll for that, create proposal. Remember step 1 - you'll need some ERC-20 in the treasury! You can't stream native token (ETH). You should see updated payroll details in the edited hats table
5. Make that proposal pass and execute it.
6. Make sure proper amount of ERC-20 tokens were sent from Safe's treasury
7. Now the tricky part - we need to verify that stream was created with proper values etc. For that - we need to go into executed transaction on Etherscan, find the event with stream creation, grab the recipient address and verify that it corresponds with the Hat Account assigned to that Hat.

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[tomstuart123]

Awesome @mudrila . Buzzed to test

I'm at step#3 but blocked by moralis netlify key needing updated. Request to update keys here. Once done, I'll finish the test

[tomstuart123]

Awesome @mudrila so good seeing this all linking up.

Primary feedback on logic/tests:

• Create brand new Safe. Fund it with some ERC-20 to use for Payroll. ✅
• Create a proposal to initialize Hats Tree (aka create 1 hat without a payroll)✅
• Execute that proposal✅
• Edit that hat - add a payroll for that, create proposal. Remember step 1 - you'll need some ERC-20 in the treasury! You can't stream native token (ETH). You should see updated payroll details in the edited hats table✅
• Make that proposal pass and execute it.✅
• Make sure proper amount of ERC-20 tokens were sent from Safe's treasury✅
• Now the tricky part - we need to verify that stream was created with proper values etc. For that - we need to go into executed transaction on Etherscan, find the event with stream creation, grab the recipient address and verify that it corresponds with the Hat Account assigned to that Hat. ✅

Note @decentdao/engineering could someone also double check my thinking for why I think the last bullet point is a ✅

• Reasoning -
  --> See below screenshot from event logs for Hat Role creation. ✅
  

--> 0xfC5Fd67C8C9e478D029827175230BEB883Bb9c09 this appears to be the hataccount for hatID '10460459718236864672367699073269748130132045948045810886507630648360960'
--> If you compare it to this screenshot, it defines 0xfC5Fd67C8C9e478D029827175230BEB883Bb9c09 as the recipient of the stream

[tomstuart123]

@mudrila approving this for now as all the logic seems to be working :). Great job

Note @decentdao/design / @decentdao/engineering - I do have a number of product/design feedback that I'm logging and will write up in the root 'streams' PR pre we deploy to dev

For now though, lets just keep heads down.

[tomstuart123]

Discussion at standup to merge now. @mudrila can you merge

[DarksightKellar]

Lookin' good. Minor comments but approving anyway in lieu of standup decision to move things forward