* refactor: 💡 Replace rose::separator comp with hds::separator
This PR replaces the rose::separator with the hds::separator and removes
an integration test that is no longer needed
✅ Closes: ICU-15646
* retire rose::separator and remove styling
* remove separator import
* remove separator.js
This PR updates the repo READMEs by replacing a broken link and pointing to correct tutorials page, adding hyperlinks to improve readability, and small language updates
Lauren