feat(marketing): implement Roadmap component with Storybook stories

[husamettinarabaci]

Is your feature request related to a problem? Please describe.
The Roadmap component (hexawebshare/src/components/marketing/ui-elements/Roadmap.svelte) currently exists as an empty skeleton file and needs full implementation with Svelte 5 and DaisyUI styling.

Describe the solution you'd like
Implement a fully functional Roadmap component that:

• Follows Svelte 5 patterns with runes ($props, $derived, $state)
• Uses DaisyUI classes statically (no dynamic string interpolation)
• Includes TypeScript interfaces for all props
• Has comprehensive Storybook stories demonstrating all variants
• Follows the project's coding standards and style guide

Describe alternatives you've considered

• Using a third-party component library - reduces customization
• Building without a component abstraction - harder to maintain consistency

Additional context
Component location: hexawebshare/src/components/marketing/ui-elements/Roadmap.svelte

Required deliverables:

1. Roadmap.svelte - Component implementation with:

   • TypeScript Props interface
   • Proper DaisyUI styling
   • Accessibility features (ARIA labels, keyboard navigation)
   • Responsive design support

2. Roadmap.stories.svelte - Storybook stories with:

   • Default variant
   • All prop combinations
   • Different states (loading, disabled, error, etc.)
   • Interactive examples
   • Accessibility testing

Impact
This component will enhance the marketing/ui-elements functionality of the library, providing users with a ready-to-use, accessible, and well-documented UI component.

Priority
Nice-to-have - Part of the component library completion effort.