* 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>
