Test our Mina pipeline and their own zk App guide

[alexandra-mara]

Our guide for building a zk app on Mina

• [ ] update the guide, fix links and unaccuracies
• [ ] check where the problem with state verification is
• [ ] update get_mina_state.py script - the ledger hashes should match; not snarked, but staged hash everywhere
• [ ] update readme ? at least dependencies