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/image.html

@@ -11,9 +11,6 @@ dimensions:
 - 64
 - 96
 - 128
-variables:
-- name: $dimensions
-  value: 16 24 32 48 64 96 128
 ---
 
 {% capture image %}
@@ -122,7 +119,7 @@ variables:
       <p>The <code>.image</code> container will take up the <strong>whole width</strong> while maintaining the perfect ratio.</p>
     </div>
 
-    {% include variables.html %}
+    {% include variables.html type='element' %}
 
   </div>
 </section>