HF audit zkApp docs: Recursion

[barriebyron]

Audit and update all zkApp docs for technical accuracy prior to hard fork #744 Before the HF, verify technical content in

Recursion https://docs.minaprotocol.com/zkapps/o1js/recursion

216 lines https://github.com/o1-labs/docs2/blob/main/docs/zkapps/o1js/recursion.mdx