Refactored the service configuration to reduce code duplication and separate data from logic.
- Created a shared `useWhatsappMsgSender` composable to handle WhatsApp URL generation and opening.
- Introduced `createService` and `createPlan` helper functions to programmatically add button actions.
- This eliminates the need to manually define `onClick` handlers for every pricing plan, making the service data purely declarative and easier to maintain.
Moved all web development service and pricing plan data from `web-design/index.vue` to a new `config/web-dev-services.ts` file.
- Centralizes service definitions for easier maintenance and scalability.
- Simplifies the `web-design` page by making it data-driven.
- Replaces static links with dynamic `onClick` handlers that generate a pre-filled WhatsApp message for inquiries.
