IDE features should work on unsaved files #1080
Description
Describe the Bug
If you create a new file and paste something into it or start editing, IDE features like semantic highlighting should kick in without needing to save.
This is the case for Pylance and Ruff/Ty
Reported by u/Green_Virus6289 on Reddit
Sandbox Link
No response
(Only applicable for extension issues) IDE Information
No response