* Tidyup `varfont_shader_puzzle`
* Add a rebuild script and a test
* Simplify fragment shaders
* Drop web
* Enable `beta` CI
* make it `beta` inclusive
* Pull out the program loading code
* added Type Jam puzzle app for review
* pr round 2 prep
* updated ci scripts for varfont_shader_puzzle
* resolved unused and minor variable naming issues
* rotator tiles row and col are final vars now
* removed unused import and print from production
* made constructors const where needed
* pages_flow export refactored to directly come from that file
* removed old api commented out section from FragmentShaded
* updated pubspec yaml to correct project name
* dart min version updated; removed unnecessary commented out dependencies from pubspec.yaml
* updated pubspec.yaml min flutter version to ensure FragmentShader support
* added/edited comments for explanation, esp on var fonts; removed obsolete comments
* trailing newline added to pubspec.yaml eof
