Create slider component

[jandrade]

• Created Slider UI component using the input[type=range] element with custom styles.
• Replaced existing speed control with the new Slider component.
• Modified a React eslint rule to turn off the PropTypes rule.

Closes #5

[MiguelCastillo]

As you noticed when you were testing the slider and the old numeric control... but increasing the speed value causes jumps in the animation. I am going to add some logic to smooth that out once this lands. Question - does the controller give a value when you release the slider or does it generate values as you move the slider?

[jandrade]

As you noticed when you were testing the slider and the old numeric control... but increasing the speed value causes jumps in the animation. I am going to add some logic to smooth that out once this lands. Question - does the controller give a value when you release the slider or does it generate values as you move the slider?

To answer your question... the controller generate values as I move the slider.