Check ui-kit token exports usage

[BleedingDev]

Context

• ui-kit already exports CSS entrypoints, but apps still deep-import.

Exports (libs/ui/package.json)

• @techsio/ui-kit/tokens -> src/tokens/tokens-only.css
• @techsio/ui-kit/tokens-with-tailwind -> src/tokens/index.css
• @techsio/ui-kit/tokens/* -> src/tokens/*.css

Current usage

• apps/n1/src/tokens/index.css imports @techsio/ui-kit/src/tokens/tokens-only.css
• apps/frontend-demo/src/tokens/index.css imports @techsio/ui-kit/src/tokens/tokens-only.css
• Tailwind @source scans ../../node_modules/@techsio/ui-kit/dist/**/*.js

Question for @KaiUweCZE
Do the exported paths work in your environment? If not, is there a way to fix it, or should we remove exports completely?