Launch a separate interface for donations to Ukraine

Create a fork of the interface that can be served from another url like donatetoukraine.uniswap.org. Changes needed:

• Remove header with "swap, pool, etc"
• Fix output selector to ETH
• Potentially remove Output selector altogether (waiting on design to clarify)
• Simplify autorouter output to show the net ETH that will be sent (design)
• Change button to "Send", instead of "Swap"
• Add a header on the top (like the L2 warnings) explaining the purpose of the page, where the funds will go, etc. (need designs)
• Publish and enable new domain to direct to this fork

[Would save this issue till the end if this is time consuming]

• Need to handle the case where someone simply uses the interface to "Send" without a swap. Should be able to bypass swapping by selecting ETH. Current setup doesn't like that.