Upgrade JUCE version, push version number for Mac Universal Build

Apply Linux-friendly patches

Update README to refer to packaged releases

Add github actions workflow to try and build a windows version

Better control layout, vitling link and parameter defaults work as expected

Add app icon

Update JUCE version

Merge branch 'notarized-release' into main

Couple of changes for releaseability

Minor explanatory comment updates

Update internal URL reference to screenshot

Add screenshot to README

Start working on release script based on Indie Mac Devops article

Add README

Add GPL copyright notices