Link to issue number:

None

Summary of the issue:

While debugging #12913, I created some Enums and added more logging.
This is not a focused refactor, and as such, more work could be done to improve the SAPI 5 driver.

Description of how this pull request fixes the issue:

• Implements IntEnums for constants
• Adds logging
• Clean up imports

Testing strategy:

Test the SAPI5 synthesizer

Known issues with pull request:

#12913

Note, this is an API breaking change and should not be merged until 2022.1.
I have just created this PR as the work should not be lost, but adding backwards compatibility is not worth prioritising.

Change log entries:

See diff in changes.t2t

Code Review Checklist:

• Pull Request description:
  • description is up to date
  • change log entries
• Testing:
  • Unit tests
  • System (end to end) tests
  • Manual testing
• API is compatible with existing add-ons.
• Documentation:
  • User Documentation
  • Developer / Technical Documentation
  • Context sensitive help for GUI changes
• UX of all users considered:
  • Speech
  • Braille
  • Low Vision
  • Different web browsers
  • Localization in other languages / culture than English