fix(core): use NcChip for unified search tags

[skjnldsv]

• Resolves: [core] unified search chips are not in tab sequence #58385

Summary

• Use default Nc component
• Remote unuses pretext variable
• Improve and fix design issues of NcChip component on @nextcloud/vue

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

AI (if applicable)

• The content of this PR was partly or fully generated using AI