Use chartkick globally

* Clean up legacy charting imports
* Update existing donut and line charts
* Create helpers for parsing out existing chart data
* Move chart partials to a more common path

app/helpers/chart_helper.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module ChartHelper
+  def chart_values(distribution_hash)
+    Hash[
+      distribution_hash.collect do |key, data|
+        [key, data['value']]
+      end
+    ]
+  end
+
+  def chart_colors(distribution_hash)
+    distribution_hash.collect do |_key, data|
+      data['color']
+    end
+  end
+end