fix(VaCard): Ability to customize outlined border colour

[Us3r-gitHub]

closes #4308

Description

1. In Va Card Component
   CSS Variable used for Card Outlined Border has been updated from va-background-element to va-background-border
2. Apply color schemes variable to define --va-block-color

Markup:

// Sample Colors Configuration
createVuesticEssential({
  config: {
    colors: {
      presets: {
        dark: {
          backgroundBorder: "ffffff",
        },
      },
    },
  },
});

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any feature but make things better)