Add recommeded Cargo optimization option to a default Dioxus template

Hi!

Dioxus [has](https://dioxuslabs.com/learn/0.7/guides/tips/optimizing) a documentation page about various optimization techniques that can help optimize Dioxus-based applications, [including](https://dioxuslabs.com/learn/0.7/guides/tips/optimizing#stable) recommended Cargo configuration. Having such a tip is a great thing but I suggest to make one more step further and add this Stable configuration to a default Dioxus template. This change can help Dioxus users to optimize their applications "by default" when they are generated via this template.

I [have](https://github.com/ratatui/templates/pull/113) a positive experience with such changes in another Rust project - Ratatui.

Thank you.