fix: update JSON schema for customUIColors

[ryanccn]

Updates workbench colors using data from ota-meshi/extract-vscode-schemas.

[sgoudham]

Hey 👋,

Thanks for this. Interestingly, there is an updateSchemas.ts file, but hasn't been updated / configured to run as part of the build.

Did you manually go through the extracted schema and replace auto-generated $ref with "$ref": "#/$defs/catppuccinColor"?

[sgoudham]

I've updated the script generation and can confirm that it matches your original PR 👍