Add support for 'Base' and 'zkSync'

[ufkhan97]

From Meg:

'Some rounds on recently added chains (Base, zkSync) don't have report cards appearing. I wonder if there's some work required on your end to get those set up?

Example: https://explorer.gitcoin.co/#/round/324/0x216c78dce86e0daa3e26758c7971245cf878293b
Report card: https://reportcards.gitcoin.co/324/0x216c78dce86e0daa3e26758c7971245cf878293b'

Goal: Add support for Base and zkSync chains to the project which accurately pulls data for each chain and displays it