Moving from tmLanguage to sublime-syntax

[john-cj]

Default packages are now use sublime-syntax format instead of tmLanguage. SublimeAutoHotkey doesn't. (Actually, it seems the new format was introduced back in 2016.)

• https://www.sublimetext.com/docs/3/syntax.html
• https://forum.sublimetext.com/t/deprecating-tm-settings-files-and-maybe-using-yaml/8682
• https://forum.sublimetext.com/t/sublime-syntax/23497

The new format seems to be easier to edit (no XML) and also more powerful.

Specific features in .sublime-syntax that are not available as part of .tmLanguage:

• The set directive
• Pushing multiple contexts via a push or set directive. (A single push/pop is equivalent to begin/end.)
• The clear_scopes directive
• Variables