Lauri/enhancement/363 redesign scrolltop component

[LauriHiltunen]

📄 Pull Request Overview

closes #363

🔧 Changes Made

app[lng](helper)\admin\page.tsx

features\ScrollTop\index.ts
features\ScrollTop\ui\v2\ScrollTop.tsx
features\ScrollTop\ui\v2\ScrollTop.module.scss
features\ScrollTop\ui\v2\ScrollTop.test.tsx
features\ScrollTop\ui\v2\ScrollTop.stories.tsx

Added a new version of the ScrollTop component and added it to the /en/admin page.

Deprecated the old ScrollTop component.

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✅ Checklist Before Submission

• Functionality: I have tested my code, and it works as expected.

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📝 Additional Information

Admin page: http://localhost:5173/en/admin
Storybook: http://localhost:6006/?path=/story/features-scrolltopv2--default

The new Scrolltop component on different devices:

[Skoivumaki]

Please center align the "arrows" inside the mobile scrolltop button. Currently its slightly off center.
Feedback based off screenshots, have not tested actual code.