fix: added server preconnect url improving the page load time

[RajvirS99]

fixes #10236

[greptile-apps]

PR Summary

Added a server preconnect feature to improve page load times by establishing early connections to the server URL.

• Created new component packages/twenty-front/src/modules/ui/utilities/server-preconnect/components/ServerPreconnect.tsx that uses react-helmet-async to add preconnect link tags
• Added ServerPreconnect component to the component tree in AppRouterProviders.tsx within the StrictMode section
• Implementation properly uses environment variable REACT_APP_SERVER_BASE_URL with fallback to localhost:3000
• This optimization reduces connection setup time when making requests to the server, addressing issue Add Preconnect if the server url isn't the same as backend url #10236
• Follows the same pattern as other Helmet-based components like PageTitle and PageFavicon

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