Write a Foundry Script to Approve Token for Batch Send

[apbendi]

In the contracts-periphery directory, write a simple script to approve a token on the batch send contract. Requirements:

• Owner private key should come from the env var
• Takes the token address as a command line argument when run
• Lightweight documentation in contracts-periphery README
• Nice to have: ability to submit multiple approve txs with one execution of the script, i.e. provide a list of tokens on the command line
• Nice to have: checks if the token is already approved and skips it if is