[Slider] does not comply to material design

[jma7889]

1. Description and slider are not in the same line, description is always above the slider. While in the material design spec, description and slider can be above or on the left side of slider.
2. No support to put text value on either end of slider. In fact, slider seem always occupy a line, cannot put text on either end. If it supports it, please add example to show how.
3. No support for discrete slider.

[rsteckler]

I would add that the implementation is inconsistent with the other "form" elements. Toggle, for example, has the descriptor on the left, and it's bold. Slider has the descriptor on the line above and it's not bold. This makes designing a form problematic.

[ashl1]

@rsteckler The MUI guys are right in that. Check the GMD specification: https://material.google.com/components/sliders.html#sliders-continuous-slider The title should be on the line above.

[oliviertassinari]

We plan on migrating the component to the v1-beta branch. I'm closing the issue for #4793.