Add total user count from live database

[adriaandotcom]

Note

Adds a composable that fetches/caches the live user count and updates Capterra and signup pages to use it.

• Composables:
  • composables/useUserCount.js: New composable that fetches userCount from DASHBOARD_URL/api/utils/total-users, caches for 5 minutes, provides fallback 30000, and exposes userCount (readonly) and fetchUserCount.
• Frontend:
  • components/Capterra.vue: Replace static import with useUserCount; call fetchUserCount() on mount to show live count.
  • pages/signup/get-to-know-each-other.vue: Integrate useUserCount and fetch on mount to display live user count in copy.

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