feat: create the list of top traded tokens for base

[anxolin]

This PR creartes a script that

1. Reads all the tokens from coingecko in base from https://tokens.coingecko.com/base/all.json (way too many!)
2. Gets the USD volume for the last 24h
3. Sort tokens by USD
4. Create a new list with the top 500

Generates this file:
https://github.com/cowprotocol/token-lists/blob/c8b2df6120d7bb4ae1943a45ee2bbadf60a4e823/src/public/CoinGecko-base.json

Test

Run:

COINGECKO_API_KEY="coingecko-key" yarn baseChainTopTokens

check the generated file makes sense

Try to the list to CoW Swap:

• https://raw.githubusercontent.com/cowprotocol/token-lists/e48620c5aa97099886292b2dccaf191eface91fd/src/public/CoinGecko-base.json

you should see the list with the top 500 tokens: