* Remove support for validation of missing leafs.
* Move proof types into separate file and borrow required procs.
* Added state proof types.
* Completed initial implementation of witness verification.
* Reject empty proofs.
* Added tests for verification of block witnesses.
* Initial implementation of account and storage proof verification for the portal state network.
* Completed initial state proof verification loop test.
* Completed proof verification tests.
* Minor updates based on PR feedback and comments.
* Add state proof verification test to test runner.