Animate `Showcase` block

[yelyzavetakhokhlova]

PR Checklist

• [x] Have you verified that the PR is pointing to the correct target branch? (develop for features/bugfixes, master for release/hotfix)?
• [x] Have you followed the guidelines in our Dev Guide
• [x] Have you lint your code locally prior to submission (npm run lint)?
• [x] Have you run prettier (npm run format)?
• [x] Have you checked that app can be built (npm run build)?
• [x] Have you checked that the build output looks according to design (screen, mobile, desktop) in Figma (npm run serve)?

Visuals