exported token names should replace "app" with "ui"

[jcfranco]

Check existing issues

• [X] I have checked for existing issues to avoid duplicates

Actual Behavior

Summary

To align with current variables in calcite-components token names should be renamed to use the word "ui" in place of "app", wherever applicable.

cc @alisonailea

Expected Behavior

No longer have tokens using app namespace.

Reproduction Sample

https://unpkg.com/browse/@esri/calcite-design-tokens@1.1.0/dist/css/calcite-headless.css

Reproduction Steps

The provided URL links to one of the output files with the relevant tokens.

Reproduction Version

1.10.0

Relevant Info

No response

Regression?

No response

Priority impact

p4 - not time sensitive

Impact

No response

Calcite package

• [ ] @esri/calcite-components
• [ ] @esri/calcite-components-react
• [X] @esri/calcite-design-tokens
• [ ] @esri/eslint-plugin-calcite-components

Esri team

Calcite (dev)

[github-actions[bot]]

Installed and assigned for verification.

[geospatialem]

Verified in 2.0.0-rc.0.