feat(pages): add web development services page

This commit introduces a new page at `/webDev` to display web development services and pricing plans.

To support this, a new reusable composable `useLocalizedCollection` has been created to simplify fetching localized content from Nuxt
Content. The index page has been refactored to use this new composable.

- Adds `webDev.vue` page and corresponding `webDev.yml` content files for EN and ZH.
- Defines a Zod schema in `content.config.ts` for the new content type.
- Updates the navigation link to point to the new page.

app/composables/NavLinks.ts

@@ -13,6 +13,7 @@ export const useNavLinks = () => {
           label: t("common.header.services.children.webDev.label"),
           description: t("common.header.services.children.webDev.description"),
           icon: "mdi:web",
+          to: "/webDev"
         },
         {
           label: t("common.header.services.children.softwareDev.label"),