fix themes: include fallback logic

[six7]

This addresses a flaw introduced in 2.0.2

Fixed #3110

Before 2.0.2 we looked at all theme configurations an created styles based on the combination of them all, which wasn't always creating expected results.

In 2.0.2 we changed that to only look at the active theme's selectedSets, but that meant users who didnt have their references created properly, got incorrectly created styles

This PR changes things to have the following logic:

• We combine all theme's selectedSets into an overallConfig which acts as the baseline, the fallback.
• For each theme, we rank the current theme's selectedSets higher, so they will always win
• When creating styles, we combine those
• In addition, we add all sets to the list, with a very low ranking. This effectively means, we run WAY less into issues where we are missing

Also, it fixes the "Remove styles" problem which was always deleting styles for users when they're not part of the current theme. Now, we look at the overall created styles and then remove those that are not touched, instead of doing so for each theme which is always wrong.

In addition, I'm disabling token-transformer tests. We're not maintaining this anymore, and this changes core logic on the transformer, which doesnt make sense to keep testing now that we have Style Dictionary.

[changeset-bot]

🦋 Changeset detected

Latest commit: 457fe32

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	Minor

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[github-actions]

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

[rbosker]

tested this build vs the current prod version:

• Prod version doesn't export styles if the 'core' is disabled and can't resolve the colors. If I have that set as active or source, it does work.
• This build works for all those 3 cases, also when 'core' is disabled.

Tested with (I think) all combinations of export settings.

[rbosker]

@six7 One issue I found: the loader stays indicating 'Create styles', but styles are created.

Screen.Recording.2024-09-02.at.12.47.59.mov

[github-actions]

Commit SHA:2b58a6f8248151392682110695962105783ae86e

Test coverage results 🧪

Code coverage diff between base branch:main and head branch: six7/themes-refactor 

Status	File	% Stmts	% Branch	% Funcs	% Lines
🔴	total	67.78 (-0.05)	58.41 (-0.06)	64.5 (0)	68.2 (-0.03)
🟢	packages/tokens-studio-for-figma/src/app/store/useTokens.tsx	52.74 (0.85)	34.61 (0.77)	56.25 (2.52)	53.6 (0.88)
🔴	packages/tokens-studio-for-figma/src/utils/tokenHelpers.ts	61.11 (-29.36)	61.36 (-33.87)	58.82 (-16.18)	69.04 (-25.69)

[github-actions]

Commit SHA:2b58a6f8248151392682110695962105783ae86e
Current PR reduces the test coverage percentage by 1 for some tests