Maintenance for R2025b

• Update to new startup app
• Improve ci.yml
• Standardize project details
• Remove reference to emailing for solutions in README as the solutions
  are included in Instructor Resources
• Update identity as the MathWorks Educator Content Development team

v1.2.1

Maintenance cycle R2024b

v1.2.0

Update to a new structure and link with updated version of Phase Plane and Slope Field apps.

• Add startup app
• Add support for dark or light theme use
• Add alt-text on images and equations in all the scripts
• Add basic smoke tests
• Add information about how to contribute to the development of this module

Minor update 1

Minor updates to the fourth script

First release

v1.0.0

Update README.md