Add Loading Component the label prop

[Diogo-Coding]

Description

Add text to Loading component via prop, to show a small text about the loading

Normally, to tell users whats going on you need to show them more information, like 'Creating chat' instead of just show an icon

Why Oruga need this feature

User experience

[jtommy]

@Diogo-Coding do you mean using it programmatically?

[Diogo-Coding]

@jtommy Either of both ways could be good tbh

[mlmoravek]

I added a label prop to the component, which will display a test next to the icon. I also added a new style class for the label span element to style the label.
Themes have to be updated later on.

[jtommy]

@jtommy Either of both ways could be good tbh

Then you can use the slot