Handle special characters in User Group name

[kopitek8]

### Tasks
- [ ] Handle special characters when transferring user group name from Firebase to Postgres
- [x] Show a warning on the consequences of using special characters for using group name

[kopitek8]

We need to add a warning banner or a simple text on the the user group create pop up modal

[frozenhelium]

@thenav56 Is there anything we need to do to support special characters in the UserGroup name field in the DB?

[kopitek8]

@Katbaloo

We have added only a warning for now while creating users.

[N00ria]

Hi! I’m a student and want to work on this issue as part of a university software engineering course (EECS 481 at the University of Michigan). Before I start, I wanted to confirm whether it’s okay to use AI tools to help understand the code and debug ideas, as long as all final code changes are written, reviewed, and tested by me. Thanks!

[kopitek8]

Hey @N00ria.

Thanks for getting in touch with you drive and willingness to work on this issue.

The issue, however, has already been worked upon and in review.

If you see anything else you're interested in, we're more than happy to accommodate it.

[N00ria]

Hey, Thanks for getting back to me! I wanted to ask if Issue #923 (Add integration test for stats generation) is still available to work on? Also, is it okay if I use AI tools for help as long as I write and review everything myself?