Docs/variables data (#1314)

* Replace variables.json with colors.json and update related files accordingly

* Add variables data files

* Update variables include template and all related files to use new variables data

* Fix mobile breakpoint id typo in responsivness docs page

* Fix Liquid syntax error in made-with-bulma docs page

* Update bulma sass files count in modular docs page

* Use breakpoints data in responsiveness helpers docs page

* Use breakpoints and variables data in typography helpers docs page

* Add missing page titles in docs pages front matter

docs/documentation/elements/box.html

@@ -3,21 +3,6 @@ title: Box
 layout: documentation
 doc-tab: elements
 doc-subtab: box
-variables:
-- name: $box-color
-  value: $text
-- name: $box-background-color
-  value: $white
-- name: $box-radius
-  value: $radius-large
-- name: $box-shadow
-  value: 0 2px 3px rgba($black, 0.1), 0 0 0 1px rgba($black, 0.1)
-- name: $box-padding
-  value: 1.25rem
-- name: $box-link-hover-shadow
-  value: 0 2px 3px rgba($black, 0.1), 0 0 0 1px $link
-- name: $box-link-active-shadow
-  value: inset 0 1px 2px rgba($black, 0.2), 0 0 0 1px $link
 ---
 
 {% include subnav-elements.html %}
@@ -81,7 +66,7 @@ variables:
 
     {% include snippet.html content=box_example more=true %}
 
-    {% include variables.html %}
+    {% include variables.html type='element' %}
 
   </div>
 </section>