Upgrade project to .NET 9 with updated dependencies, documentation, and CI/CD#2

Loupeznik merged 3 commits intomasterLoupeznik/ToDoAppTemplate:masterfrom

copilot/fix-d0866f42-320d-4e24-8a27-c2f5e632b526Loupeznik/ToDoAppTemplate:copilot/fix-d0866f42-320d-4e24-8a27-c2f5e632b526Copy head branch name to clipboard