Git issue 539: Bug: Partial matching fails on a simple example

Git issue 535: Regex fails Unicode 15.1 GraphemeBreakTest due to
missing new GB9c rule implementation

Git issue 530: hangs with fuzzy and optionals
It's not hanging, it'll finish eventually. It's just an example of
catastrophic backtracking.
The error printed when Ctrl+C is pressed does show a bug, though,
which is now fixed.

Updated for Python 3.13.
<time.h> now needs to be included explicitly because Python.h no
longer includes it.

Git issue 527: `VERBOSE`/`X` flag breaks `\N` escapes

Git issue 525: segfault when fuzzy matching empty list

Cannot get release notification action in main.yml to work.
Commenting it out for now.

Fixed invalid main.yml.

The escape function no longer escapes \x00. It's not necessary.
Inline flags can now be turned off and apply to what follows.
Added \R to match line endings.