We should be able to substitute most (if not all) of the complex code in src/safe.ts with @safe-global/relay-kit

https://docs.safe.global/sdk/relay-kit/guides/4337-safe-sdk#initialize-the-safe4337pack

I started a gist on the issues encountered so far:

https://gist.github.com/bh2smith/27f177a627a0e8679847b857c4d40d66/edit