Centralizing Chains/Tokens/Subscriptions for all apps

[codenamejason]

We want to make it simple to add new payout and donation tokens.

https://hackmd.io/RPwIcw_kRUi-OoXYVC5SfQ

[WIP] Repo -> https://github.com/codenamejason/gitcoin-common-data

[owocki]

some notes: 0. can we maintain a canonical list of supported tokens somewhere that each app derives from?

1. for v0 of this.. perhaps we can assume a token added supports permit 2. for a v0.1 of it, if a token doesnt support permit2, the app would need to still support it (and perhaps issue an "approve" txn)
2. anything else @thelostone-mc