Add validation for new shared folder

[Tbaut]

closes #1293

• refactor to use only 1 name validator (it was redundant with only small error changes)
• remove the specific whitespace error while trim handles this nicely

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[tanmoyAtb]

Works great!
We just need to add the validator to create shared folder during share file!

[Tbaut]

Ah thanks I thought I had that in. I'll check it out.

[Tbaut]

Should be good now @tanmoyAtb

[asnaith]

Looking good but I noticed these changes also stop the user from having a legitimate space in the name, for example "My Share" is no longer possible.

🟩 User cannot create a folder with name being white space only
🟩 User cannot create a folder without entering any characters for the name
🟩 User cannot create a folder with name exceeding 65 characters
🟩 User cannot create a folder with name containing "/"
🟥 User should be able to create folder with space in the name eg "Best Share Folder"

[Tbaut]

Nice catch! will fix that.

[Tbaut]

ok should be good to go now

[FSM1]

This PR seems to be breaking the Rename a file test

1) File management
 |        desktop
 |          can rename a file with error handling:
 |      AssertionError: Timed out retrying after 4000ms: Expected to find element: `[data-cy=rename-form] span.minimal.error`, but never found it.
 |       at Context.eval (http://localhost:3000/__cypress/tests?p=cypress/tests/file-management-spec.ts:495:56)

[FSM1]

great stuff :)

[Tbaut]

I'll stop there, thanks a lot for the thought review, this was really needed, and I'm super glad the tests caught a bug, nice catch @FSM1 !

I think this will conflict with Tanmoy's PR, I'll merge his before