* demo for witness generator
* add simple binary for witness generating
* revert the witgen utility
* purge some code
* induce mptwitness argument
* handle case for failed tx, and special block in POA
* mptwitness: refactor for enabling output ops with different order
* induce witness gen with rwtable order
* self-documenting options for mptwitness
* fix trace flag according to review
* fix issue in handling failed tx
* refactor
* update according to reviews
Co-authored-by: HAOYUatHZ <haoyu@protonmail.com>
* Move code of `captureStateAfter` to `captureState`, and refactor some
code.
* Fix to use the right key in `traceStorageProof`.
* clean up
* Update `capatureStateAfter`.
* fix
* fix
* Get storage key from stack of last log.
* Revert wrong fix.
* minor
Co-authored-by: HAOYUatHZ <haoyu@protonmail.com>