Uninformative and misleading validation during package creation

Steps to reproduce:

1. Create a project
2. Window -> Package Management -> Package Manager
3. Click “+” and select “Create package”
4. Enter "12345" into the package name and click “Create”
5. Observe the newly created package name in the "Package Manager" window

Actual results: Instead of "12345," the user gets the "New Package" name

Expected results:

• Package Display Name should keep "12345"
• Package Technical Name should be renamed 
• Warning should survive and be visible after domain reload

Reproducible with versions: 6000.3.0a3

Not reproducible with versions: -

Can’t test with versions: 6000.3.0a2 as package creation functionality landed just in 6000.3.0a3

Tested on (OS): M1 Max - Sequoia 15.5

Notes:

• A user gets a validation message in the "Install package by name" window.  So the "Create package" window should have the same validation workflow. Users would be informed at that moment when they execute it, not a post action message in the "Concole" window when package with different title is created.