Request: add Optimism

[gigamesh]

Checklist

• I understand that this is not the place to request token listing.
• I have tested that my list is compatible by pasting the url into the add a list UI at app.uniswap.org.
• I understand that filing an issue or adding liquidity does not guarantee addition to the token list website.
• I will not ping the Discord about this listing request.

List URL: https://static.optimism.io/optimism.tokenlist.json
List Name: Optimism ...(I think we can say Optimism here instead of Optimistic Ethereum)
Link to the official homepage of the list manager: optimism.io