Hide variables from export

When working with design tokens, not every variable should end up in an export. Internal aliases, private overrides, or work-in-progress tokens are often necessary inside the file but irrelevant for code.

Right now there's no way to exclude individual variables from export.

• Extend the existing "Hide from publishing" checkbox so it also suppresses the variable from export output
• Or add a dedicated "Hide from export" checkbox (as shown in the screenshot)

Low effort, high value. 🙌