Add more examples

[Moxinilian]

Hey! I find it a bit difficult to get started with ybc because it's not immediately obvious how bulma constructs map to ybc ones. Notably, showing how to make forms would be appreciated as it uses multiple components in intricate ways.

[NickLarsenNZ]

I'm also struggling to make sense of it. I've been resorting to searching through the source for implementations of Component and looking at the Properties that are used.

Another interim option is the cargo docs: https://docs.rs/ybc/0.2.1/ybc/?search=Props