remove all strings

[JTraversa]

• Removed all strings errywhere (other than token names and domain stuff)
• Updated to newer Solmate Erc20 (PErc20 -> Solmate ERC20)
• Replaced zcToken implementation -> ERC5095 implementation

Did not:

• Update all names from Erc -> ERC
• Change name of ZcToken -> ERC5095 (so as to not screw tests)

[robrobbins]

we've moved to the no-mo-strings-2 branch.