[SG-39363] Extract bootstrap style import` @import 'bootstrap/scss/card'` in `client/vscode`

Created by: gitstart-sourcegraph

Description

Removes bootsrap card stylesheet import and converted to wildcard component

Ref

Gitstart Issue Sourcegraph Issue

Success criteria

1. All use cases of card-* are migrated to use wildcard's Card component.

Implementation details

1. Remove bootstrap import @import 'card/scss/card' in forkedBranded.scss.
2. Covert use cases of card-* className to Card wildcard component.
3. If step 2. above is not doable, let's copy style rule from bootstrap to be used internally.

Test Plan

• Run the vscode app on this branch
• See all use cases of bootstrap's card-* className on the codebase (seam to be only in HomeFooter.tsx)
• Confirm there are no UI diffs.

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.