add start and end icon to Input component

[mohammad-reza-tajik]

hi . thanks for your amazing project.
I was wondering if there's a chance that you make the Input component accept startIcon and endIcons props like Button component does?
something similar to inputAdornments prop for TextField component in material-ui ?
thanks❤️

[dev0T]

I think this would be a great feature to have. As soon as I have the time I'll try to come up with a PR for this.