Fix empty token group creation

[akshay-gupta7]

Why does this PR exist?

Fixes #2171

What does this pull request do?

Currently, users can name token like abc...... (probably sometimes by mistake), which results in the creation of empty nested groups, thereby mangling with the tokens json. This PR will now not allow for such names to be entered

Testing this change

• Try to create a token with a name like abc......
• User will be displayed a message "Token names cannot contain empty groups"

Additional Notes (if any)

[changeset-bot]

🦋 Changeset detected

Latest commit: c4b66e6

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@tokens-studio/figma-plugin	Patch

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[github-actions]

⤵️ 📦 ✨ The artifact was successfully created! Want to test it? Download it here 👀 🎁

[github-actions]

Commit SHA:d7a942903c41ff91605071bb0b1aedd91502fcb6

Test coverage results 🧪

Code coverage diff between base branch:main and head branch: fix-empty-token-group-creation 

Status	File	% Stmts	% Branch	% Funcs	% Lines
🟢	total	67.09 (0)	58.08 (0.03)	63.87 (0.01)	67.47 (0.01)
🟢	packages/tokens-studio-for-figma/src/app/components/EditTokenForm.tsx	50 (0.99)	34.23 (2.16)	40.81 (1.23)	51.72 (0.96)

[six7]

Nice!

[keeganedwin]

Successfully reproduced the fix for this issue: