Add recommeded Cargo optimization option to a default Dioxus template

[zamazan4ik]

Hi!

Dioxus has a documentation page about various optimization techniques that can help optimize Dioxus-based applications, including 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 a positive experience with such changes in another Rust project - Ratatui.

Thank you.

[zamazan4ik]

@jkelleyrtp kindly pinging you here since the issue seems like missed :)