fix import of variables speed

[six7]

Why does this PR exist?

Fixes speed of variable creation by ... perceived 100x
Fixes #3122

What does this pull request do?

Properly import variables by not doing it one by one but rather in one swift swoop

Testing this change

Import variables into tokens... also test if you can update existing ones properly as expected

Additional Notes (if any)

[changeset-bot]

🦋 Changeset detected

Latest commit: 7197f91

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 👀 🎁

[rbosker]

tested and this improves the import speed a lot

[deepsource-io]

Here's the code health analysis summary for commits fd68d5a..c52591e. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Shell	✅ Success		View Check ↗
JavaScript	❌ Failure	❗ 2 occurences introduced 🎯 1 occurence resolved	View Check ↗

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[github-actions]

Commit SHA:7d5ef98e9324869ba4b739e0f86184930f451069

Test coverage results 🧪

Code coverage diff between base branch:main and head branch: six7/fix-import-variables 

Status	File	% Stmts	% Branch	% Funcs	% Lines
🟢	total	67.96 (0.03)	58.57 (-0.01)	64.63 (0.06)	68.37 (0.02)
🔴	packages/tokens-studio-for-figma/src/app/store/useManageTokens.tsx	82.55 (-0.4)	78.37 (1.45)	75 (-1.47)	82.35 (-0.4)
🟢	packages/tokens-studio-for-figma/src/app/store/models/tokenState.tsx	77.44 (1.19)	64.34 (-0.79)	83.5 (1.09)	77.23 (1.04)
🔴	packages/tokens-studio-for-figma/src/plugin/pullVariables.ts	85.29 (0)	62.74 (-3.11)	100 (0)	84.37 (0)

[github-actions]

Commit SHA:7d5ef98e9324869ba4b739e0f86184930f451069
Current PR reduces the test coverage percentage by 1 for some tests

[macintoshhelper]

LGTM; tested with an import, then updating variables and importing again. Editing existing tokens seems to work too.

Importing variables with the production plugin hangs the plugin/Figma for about ten seconds, import happens in under a second now 💯 🎉