Users want school district lines on visualization pages

[k-y-le]

Is your feature request related to a problem? Please describe. Per MI feedback and others, it seems that many users consider school districts important to their definition of community

Describe the solution you'd like Users should be able to toggle a data layer with school district lines on visualization pages

Additional context Census school district lines are split between elementary school districts, secondary school districts, and unified school districts. This means more layers have to be uploaded in order to view these districts.