Objdictgen

* Add support for wxPython >=4, which support python 3
* Remove python 2.7 support
* Improve command-line options and printing
* Dark mode (alas not for windows 😭 )
* Remove `objdictgen` and `objdictedit` command-line tools
* Major code refactoring. For improved python 3 syntax and general code cleaning.
* Type annotation update
* Test suite and code coverage improvements
* ++many many minor fixes

Contributors 🎉
chrisinabox - For porting to xwPython 4, changing `eval` to `ast` and removing python 2
aduskett - For dark mode compatibility

* Updating repo URL
* Remove py2.7 from deployment

* Fork from from CanFestival into a separate python project
* Support for new `json` format and existing `od` (XML) format
* Adding `odg` command-line tool with rich features
* Legacy `objdictedit` tool (Python 2.7 only due to dependency on legacy wxPython)