feat: Implement deprecated tokens feature

[pvignau]

Why does this PR exist?

Closes #0000 - No related issue

Hey there, this is a feature proposal. Me and my team struggle with token lifecycle, mainly about token depreciation.
Around this, this is a first draft to work on it and, I hope, define a workflow for this case.

What does this pull request do?

It updates the UI and some token entity attributed (mainly token deprecated attribute).
Here are the functionality it adds :

• Token deprecation switch in the token creation/edition modal
• Deprecation notice on list by highlighting the deprecated ones
• Possibility to hide deprecated tokens
• Possibility to not sync deprecated tokens with figma vars
• DTCG 2025.10 and Legacy format compliant (about deprecation)

Here are some screenshots before and after :
Dashboard - before

Dashboard -after

Creation modal - before

Creation modal - after

Sync variables page - before

Sync variables page - after

Hide deprecated tokens - before

Hide deprecated tokens - after

Deprecated token (DTCG) :

{
  "my": {
    "super": {
      "deprecated": {
        "token": {
          "$deprecated": true,
          "$type": "color",
          "$value": "#3488e6"
        }
      }
    }
  }
}

Deprecated token (Legacy) :

{
  "my": {
    "super": {
      "deprecated": {
        "token": {
          "value": "#3488e6",
          "type": "color",
          "$extensions": {
            "studio.tokens": {
              "deprecated": true
            }
          }
        }
      }
    }
  }
}

Testing this change

You can :

• Add a deprecated token and a non-deprecated token
• Try to hide and unhide the token
• Sync variables with figma with the ignore deprecated tokens switch activated. (no deprecated token should be synced)

Additional Notes (if any)

I've added some translation (thanks Claude 🤖) but I'm no translator.
If a token is deprecated after the variable is synced and the ignore deprecated tokens switch is on, I've arbitrary chose to let the variable live on its own and not delete it (it'd be deleted if the delete variable w/o sync to a token is checked)
This is my first PR here, don't mind about telling me what's right or wrong :)

[changeset-bot]

🦋 Changeset detected

Latest commit: f46c9e4

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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[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 10 complexity · 20 duplication

Metric	Results
Complexity	10
Duplication	20

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