fix variable setting for various cases

[six7]

Why does this PR exist?

Closes #3208

The prod version currently just checks for equality of old value vs new value, but forgets that alias references could exist which would always mean they're not equal - thus we're not updating the reference when the user goes from reference -> hard value. It worked before if we went from reference -> another reference (because another function is responsible for that)

What does this pull request do?

This PR modifies the early return to not return if we have an alias reference, and instead go and update.

Testing this change

Create variables of all types and export to Figma that are a hard value and the other a reference to another variable
Then update the variable that references to now be a hard value again.

[changeset-bot]

🦋 Changeset detected

Latest commit: 1f7988b

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:949b608b303c7eceb28200e1d928c58bade10eec

Test coverage results 🧪

Code coverage diff between base branch:main and head branch: six7/fix-variable-reference-set-value 

Status	File	% Stmts	% Branch	% Funcs	% Lines
🟢	total	67.05 (0.05)	57.94 (0.11)	63.89 (0.01)	67.39 (0.03)
🟢	packages/tokens-studio-for-figma/src/plugin/setBooleanValuesOnVariable.ts	87.5 (17.5)	100 (33.34)	100 (0)	85.71 (7.94)
🔴	packages/tokens-studio-for-figma/src/plugin/setColorValuesOnVariable.ts	100 (0)	89.65 (-10.35)	100 (0)	100 (0)
🟢	packages/tokens-studio-for-figma/src/plugin/setNumberValuesOnVariable.ts	100 (33.34)	100 (33.34)	100 (0)	100 (25)
🟢	packages/tokens-studio-for-figma/src/plugin/setStringValuesOnVariable.ts	85.71 (14.29)	100 (25)	100 (0)	83.33 (0)
✨ 🆕	packages/tokens-studio-for-figma/src/utils/isAliasReference.ts	100	33.33	100	100

[github-actions]

Commit SHA:949b608b303c7eceb28200e1d928c58bade10eec
Current PR reduces the test coverage percentage by 1 for some tests

[rbosker]

Tested with exporting as sets and exporting as themes. Both work as expected and you can change a reference to raw value and vice versa again.

[akshay-gupta7]

Working as expected!✨