[FEAT] [FLUTTER] Have a base class for all icons

[josencv]

Is your feature request related to a problem? Please describe.
In my Flutter app I have Widgets that need configurable icons (e.g. a "label + icon" button). Since the icons are just widgets, I cannot do the following:

1. I can't restrict a Widget to receive an iconoir icon, not just any widget
2. I can't configure the properties of the icon from within the widget that received the icon as parameter (for example, I would like to change the color of the icon based on the button state)

Describe the solution you'd like
Have a base class for all icons that exposes the common properties (color, width, height)

Describe alternatives you've considered

• Downloading the SVGs and manually handle them without using the flutter adapter. I'm still considering it.

Additional context

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