feat(hubspot-integration): dynamically load HubSpot script in production environment

- Added a script to conditionally load the HubSpot tracking script in the index.html file when the hostname matches 'app.worklenz.com'.
- Removed the HubSpot component from MainLayout to streamline the integration process.

worklenz-frontend/src/layouts/MainLayout.tsx

@@ -68,7 +68,6 @@ const MainLayout = () => {
             <Outlet />
           </Col>
         </Layout.Content>
-        {import.meta.env.VITE_APP_ENV === 'production' && <HubSpot />}
       </Layout>
     </ConfigProvider>
   );