feat: add new networks to cowswap

[cowdan]

Summary

Adding new networks to the CoW Swap integration

• Add Avalanche
• Add Polygon

Testing

Setup the UI locally:

1. Clone the repo and checkout this PR
2. Install dependencies with yarn
3. Start the local server with yarn dev

Steps:

1. Open the SWAP interface and connect your wallet
2. Set network to one of [Avalanche, Polygon]
3. Pick sell token and sell amount
4. CoW Swap should show as one of the options
5. Pick CoW Swap and send the order
6. Order should be placed
7. Check the explorer link
8. AppData should include:
9. partnerFee with feeRecipient set to 0x1713B79e3dbb8A76D80e038CA701A4a781AC69eB
10. quote with slippageBps set to whatever you chose in the UI
11. Repeat from 3-5 selling the native token
12. Same except that it's an ethflow order
13. EthFlow contract used (on all chains) is 0xba3cb449bd2b4adddbc894d8697f5170800eadec
14. Repeat 2-6 for the other network

[vercel]

@cowdan is attempting to deploy a commit to the llamaswap Team on Vercel.

A member of the Team first needs to authorize it.