[IMPR] Add some classes and functions to __all__ variable in pywikibot
[IMPR] Add some classes and functions to __all__ variable in pywikibot

- ignore deprecated setAction function
- ignore stopme function which is always used at exit time
  and it is not needed to call it
- remove inputChoice which has been dropped
- update documentation and fix reST markup

Bug: T122879
Change-Id: I08ad939bdb53c565adaf922a0547354be7676998

wikimedia/pywikibot-core,wikimedia/pywikibot-core