feat: Update card border radius

[hxtree]

This pull request updates the border radius of the card component to use a dynamic value defined in the SCSS variable $card-radius. This allows for easier customization and consistency across the application.

[codacy-production[bot]]

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Coverage variation	Diff coverage
:white_check_mark: +0.00%	:white_check_mark: ∅

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (c84dcf7a76356763be569ec72eeb4ec0ddf38812) | 2273 | 1615 | 71.05% | | | Head commit (4640bf2b75855894bf220caf444c6c3d0665f222) | 2273 (+0) | 1615 (+0) | 71.05% (**+0.00%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#897) | 0 | 0 | **∅ (not applicable)** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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