"Create AL Project from Template" improvements

[jwikman]

A few additions wanted for the NAB: Create AL Project from Template feature:

• Support special characters (as < and >) in description and example fields
  • asdf <a.b@c.d> only shows as asdf
• Support for a max length for the text supplied in a mapping
• Support for deleting files
  • Useful for removing any readme.md files that is being used to describe how to use this template project
• Support opening a file when VSCode has restarted with the workspace
  • This might be solved by Run tasks after the template conversion #302

[github-actions]

👋 Hey there! This issue has been chilling in the backlog for a while and is starting to grow a beard.
If you're still interested, give it a poke! Otherwise, it might wander off into the land of forgotten tickets.

[github-actions]

🧹 We’ve done some spring cleaning and this issue didn’t make the cut.
If this was a mistake, feel free to resurrect it like a bug-hunting necromancer. Thanks for your contribution!