[Docs] How To: Optimize Dependencies

[brookslybrand]

Describe what's incorrect/missing in the documentation

Based on Remix's dependency optimization guide, we need documentation for unstable_optimizeDeps, explaining how to optimize bundle sizes and improve application performance through smart dependency management.

[RigoOnRails]

Definitely agree! Documentation for unstable_optimizeDeps should also be included in the Framework Adoption from RouterProvider guide. 🤠