Release Zipped Files, new number separator handling, added Swedish · NSoiffer/MathCATForC

Update to MathCAT 0.6.1.

New features

All the language and braille Rule files are zipped up per directory and unzipped on demand.
- This currently saves ~5mb when Rules.zip is unzipped, and will save even more as more languages and braille codes are added.
- If you know certain languages or braille code will definitely be used (e.g., it is the default), then the files in those directories can be manually unzipped to save a few tens of milliseconds the first time the language/braille code by that user.
Added new preference DecimalSeparator.
- The default value is Auto, with other values being ".", ",", and "Custom". The first three values set DecimalSeparators and BlockSeparators.
- Auto sets those preferences based on the value of the Language pref. For some language such as Spanish, , is used in some countries and . is used in others. In this case, it is best to set the language to also include the country code (e.g, es-es or es-mx) to ensure the right value is used.
Added more Unicode chars to include both all Unicode chars marked as "Sm" and those with a mathclass (except Alphabetic and Glyph classes) in the Unicode standard.
Added Swedish to supported languages.

After changing how prefs work in a previous version, I forgot to change MathRate and PauseFactor to be numbers, not strings.
Fixed bug in the braille Rules (missed change from earlier) where a third argument should have been given to say to look in the Braille definitions.yaml files and not the speech ones when looking up the value of a definition.
Cleaned up use of definitions.yaml.
Fixed some bugs in the MathML cleanup for "," decimal separators.
Found a bug in braille highlighting when nothing is highlighted (maybe never happens which is why I didn't see it in practice?)
Fixed "Describe" mode so that it works -- it is still very minimal and probably not useful yet

Added Windows ARM 64-bit build in last release. Awaiting feedback that it works.