* add vector, lifo and fifo structures

* fix lint

* need more memory for coverage

* remove Vector wrappers and gas optimization

* refactor Vector testing

* revert package.json changes

* rename to DoubleEndedQueue

* rename and refactor

* refactor tests and expand coverage

* test for custom errors

* add changelog entry

* add docs

* add sample code and note about storage vs. memory

* add available since

* lint

* use underscore for struct members

* add struct documentation

* remove SafeCast in length

* rename i -> index and improve docs

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>