* pySim.app: Attempt to retrieve the EID of a SGP.22 / SGP.32 eUICC
* pySim-shell: Migrate PySimApp.iccid to RuntimeState.identity['ICCID']
* runtime: Introduce an 'identity' dict for things like ATR, ICCID, EID
* Fix various mistakes around the CardADF <-> CardApplication dualism
* filesystem: fix various issues found by mypy
* filesystem: Avoid GPL header showing up in sphinx autodoc
* Use sphinx for generating documentation
* Add more documentation to the classes/methods