Breaking
* refactor(everything): Refactor for easier to maintain code
CI based on Github workflows, EyeVolume class as a standard way for handling OCT volumes, support for HEXEX VOL/XML, Bscans from folder, DUKE and RETOUCH data
BREAKING CHANGE: ([`117ef89`](https://github.com/MedVisBonn/eyepy/commit/117ef89ec5874b366abb0da2b544011799a4e4f5))