GDL Incorrectly disallows some characters in instance name

[ScottKillen]

• I searched the issue tracker for other issues covering my case
• This is a Launcher issue.

Describe the bug
If I create an instance, GDL will not allow the name to include brackets and parenthesis; however, I can rename my folder outside of GDL, and GDL picks up on the instance even though it includes these 'illegal' characters.

To Reproduce
Steps to reproduce the behavior:

1. Create a new instance using the Better MC [FABRIC] - BMC 1 from Curseforge.
2. Type Better MC [FABRIC] - BMC 1 for the instance name
3. Notice the error message saying that the instance name is not valid.
4. Clear the instance name field to allow the instance to use the default name.
5. Create the instance.
6. Close GDL.
7. Rename the instance folder with the name that includes the 'illegal' characters.
8. Notice that the instance's name is the same as what you were not allowed to type in GDL.

Expected behavior
GDL should not disallow valid instance names.

Possible solutions
Allow GDL to determine valid instance names based on the platform it runs on.

Screenshots

Operating System:

• OS: Windows 11
• Launcher Version: v1.1.30
• Java Version: N/A
• Minecraft Version: N/A
• Mod Loader: N/A