Refactor component class creation

[filipdutescu]

Description

Currently, a component's CSS class creation is very linked to the component function. This is less than ideal for testing and logically, since that code is, with the exception of it being passed to the html! macro, completely decoupled from any component logic,

Proposal

Implement the From<T> trait for all component properties in order to have a conversion to yew::Classes. Similar to how the logic is done in the yew_and_bulma::elements::button::Button component.

Other relevant information

No response