Slider value expressivity and style options

[codementum]

Is your feature request related to a problem? Please describe.

In this example, it would be helpful to:

Style

1. control slider width to make it "thinner"
2. (less critical) change text lightness on the labels to be a bit darker

Technical

1. Note the value 2 in the tooltip above 0.2-- currently matching 0.1 to 1, 0.2 to 2, etc. was the only way to get the ticks to select. When we put value as 0.2 instead of 2, it would skip to the 0 or 1.

Describe the solution you'd like

Slider config options, either options in the config itself or some style string? Whatever is easiest.

Describe alternatives you've considered

Other option would be a custom component.

Additional context

Current slider config ->

"understanding_test_2": {
      "type": "markdown",
      "path": "motivated-scatterplot-1b/assets/understanding_test_2.md",
      "nextButtonText": "Next",
      "response": [
        {
          "id": "correlationQuestion",
          "prompt": "How correlated do you think the data looks?\n\n",
          "required": true,
          "type": "slider",
          "options": [
            {
              "label": "0",
              "value": 0
            },
            {
              "label": "0.1",
              "value": 1
            },
            {
              "label": "0.2",
              "value": 2
            },
            {
              "label": "0.3",
              "value": 3
            },
            {
              "label": "0.4",
              "value": 4
            },
            {
              "label": "0.5",
              "value": 5
            },
            {
              "label": "0.6",
              "value": 6
            },
            {
              "label": "0.7",
              "value": 7
            },
            {
              "label": "0.8",
              "value": 8
            },
            {
              "label": "0.9",
              "value": 9
            },
            {
              "label": "1",
              "value": 10
            }
          ]
        }
      ]
    }