feat: multiple styles for components

[qu3vipon]

Resolve: #353

looping through a list and overwriting earlier ones.

This renders a yellow box:

def index():
    return pc.box("box", style=[{"background_color": "orange"}, {"background_color": "yellow"}])

app = pc.App(state=State, style={pc.Box: {"background_color": "red"}})
app.add_page(index)
app.compile()

[picklelo]

Awesome!