* add parameter fast_validation to the api
* arg `verify-chain` on node client
* arg verify chain + read_timeout parameter
* change timeout to 2hours
* update with tromp review
* 2nd comment from tromp
* wip - "reset_head" via owner api functionality
* jsonrpc pass hash in as a string
* sort of works
* not a reorg if we simply accept several blocks at once
* remember to reset header MMR separately
as it is readonly when interacting with txhashset extension
* basic client integration
needs error handling etc.
* reset sync status when reset chain head
* track "denylist" (todo) and validate headers against this via the ctx
* track denylist (header hashes) in chain itself
* header denylist in play
* expose invalidateheader as client cmd
* rework reset_chain_head - rewind txhashset then header MMR
* Node API v2
* Update gitignore
* Add get_pmmr_indices method
* Add Foreign and Owner API each one with specific secret
* Fix failing tests
* Revert to 'Option<u64>'
deevope