Uniswap V4 6909

replaced erc-1155 with erc-6909. it:

• simplifies burning and transferring logic
• removes unnecessary callbacks
• removes unnecessary batching
• removes unnecessary recipient checks
• reduces codesize dramatically

full gas report is in the following gist: https://gist.github.com/jtriley-eth/2884dca4a9cbef420f086a13e240f539

burning tokens saw the most dramatic improvement of a 5.6x improvement across the board, reducing the cost by 22,697 gas.

this project uses erc-6909 for multi-token accounting and foundry as a testing framework (of course).

this is a really simple project, there's not much in terms of technicals to it, but the form is requiring a higher character count so i'm adding this placeholder,,,,,,,,,,,,,,,