Add slider component

[mtsvyatkova]

Closes #39

[rkaraivanov]

@mtsvyatkova
Ok, can we take a different approach for the slider component.

Can we:

• Separate the thumb logic and implementation as a separate component
• Make use of the @watch decorator we have in the repository instead of calling requestUpdate. As
  a bonus it can wait for the first update paint.
• The implementation is very "Angularish" which is maybe not the correct approach in this case.

Maybe we can get together in a session and discuss the points above

[rkaraivanov]

See above ☝️

[DiyanDimitrov]

@gmurray81, Could you please take a look at the public API of the slider components and let us know if it will work ok for Blazor? I have some concerns for the range slider. We have lower and upper value properties and a single igcInput/igcChange event is emitted when any of the two values is changed. Is that going to work ok for the Blazor bindings?

[gmurray81]

Thanks for the heads up @DiyanDimitrov will look into it soon.

[DiyanDimitrov]

Thanks for the heads up @DiyanDimitrov will look into it soon.

@gmurray81, Did you get a chance to look into this?

[gmurray81]

@DiyanDimitrov I think we should be able to make that work as long as the args have the values in them

[gmurray81]

but I'll probably need to adjust something in the auto gen, at a guess