feat: basic responsive layout for index builder

[bodom0015]

Problem

Smaller screens have overlapping elements

We would like a more responsive layout that adjusts to the size of the user's screen

Starts to fix #150

Approach

• Stacked layout for "Select Indicators" and "Choose Weights" pages
• Adjust panel min/max height on "Summary & Map" page (layout likely needs work)
• fix: avoid double-scroll when IndicatorsList is stacked (on smaller screens)

How to Test

1. Navigate to https://deploy-preview-156--chicago-env-explorer.netlify.app/builder
   • You should be brought to the "Select Indicators" page
   • For smaller screens, you should see that "Select Indicators" now has a stacked layout with a single scroll bar
2. Select one or more indicators and click Next
   • You should be brought to the "Choose Weights" page
   • For smaller screens, you should see that "Choose Weights" now has a stacked layout with a single scroll bar
3. Adjust weights as desired and click Next
   • You should be brought to the "Summary & Map" page
   • For smaller screens, you should see that "Summary & Map" left-side panel is hidden by default (click the info icon to show the panel). The panel height should also change based on the size of the user's screen.

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[bodom0015]

Thank you, @mradamcox! I think I was able to address your feedback here - let me know what you think!

• panel height/width has been adjusted to closer match the previous behavior
• adjusted styling of the show/hide button to match the existing map view :+1:

I know one issue that remains is that smaller screens in landscape mode have a weird split-up panel display.. but I’m hoping this will be an edge case that no one runs into :sweat_smile: