feat(slider): add component tokens (#8899)

**Related Issue:** #7180 

## Summary

Adds the following component tokens (CSS props):

* `--calcite-slider-fill-color`
* `--calcite-slider-histogram-accent-color`
* `--calcite-slider-histogram-background-color`
* `--calcite-slider-handle-border-color-hover`
* `--calcite-slider-handle-border-color`
* `--calcite-slider-handle-color-active`
* `--calcite-slider-handle-color-hover`
* `--calcite-slider-handle-color`
* `--calcite-slider-precise-handle-color-hover`
* `--calcite-slider-precise-handle-color`
* `--calcite-slider-handle-shadow-hover`
* `--calcite-slider-handle-shadow`
* `--calcite-slider-text-color`
* `--calcite-slider-text-size`
* `--calcite-slider-tick-border-color`
* `--calcite-slider-tick-color`
* `--calcite-slider-track-color`