* add registerAllowedSigner to NativeOrdersFeature
* fix PR reference in changelog
* prettier
* add cancel pair orders functions for signers
* refactored cancelPairOrders logic, changed naming of signerRegistry to orderSigner registry everywhere, cleaned up tests
* updated changelog for protocol-utils, made batchCancelPairOrders functions more efficient
* clean up function documentation
* added additional tests for batchCancelPairsWithSigner functions, added additional checks for events being emitted correctly
* fix typos in function documentation
* fix typo in function documentation
* update docs
* update comments on cancel functions, small tweaks to docs
* Adds `docs` directory, along with boilerplate code and templates for readthedocs.org.
* docs: update orders spec
Co-authored-by: Lawrence Forman <me@merklejerk.com>