Fixed Form Menu item for Read user

[Akash-Ramjyothi]

What kind of change does this PR introduce?

Read users don't have the ability to fork. Clicking this menu option leads to an error notification, so hiding it. Left the option in the command palette if you seek it out - it will still give you an error notification. Not sure if there's a way to show it but disable.

Checklist

• [x] Documentation
• [x] Testing
• [x] Ready to be merged
• [ ] Added myself to contributors table

[codesandbox-ci[bot]]

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[lbogdan]

Build for latest commit https://github.com/codesandbox/codesandbox-client/pull/6638/commits/ae17816dc56832fd1f91804a5ec9f4b398b57c07 is at https://pr6638.build.csb.dev/s/new.

[Akash-Ramjyothi]

@lbogdan sir please review my PR.

[CompuIves]

Hmm, I don't think this one's true. If you have read access, you should still be able to fork because that's how you get your own version to work on it. What kind of error are you getting? Because that would be abug.