Merge pull request psychopy#6416 from TEParsons/release-bf-kb-test

BF: ioHub keyboard was registering key releases before presses, so duration was always None

Merge pull request psychopy#6395 from kimDundas/codesprint_docs

DOC: Added docs on how to edit docs

Merge pull request psychopy#6349 from peircej/release

Fixed inability to load plugins list from local with non-utf-8 default encoding

Merge pull request psychopy#6339 from peircej/dev

Packaging and adding some release/docs fixes

Merge pull request psychopy#5813 from psychopy/release

Merging release back into dev