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/title.html

@@ -3,27 +3,6 @@ title: Title and Subtitle
 layout: documentation
 doc-tab: elements
 doc-subtab: title
-variables:
-- name: $title-color
-  value: $grey-darker
-- name: $title-size
-  value: $size-3
-- name: $title-weight
-  value: $weight-semibold
-- name: $title-strong-color
-  value: inherit
-- name: $title-strong-weight
-  value: inherit
-- name: $subtitle-color
-  value: $grey-dark
-- name: $subtitle-size
-  value: $size-5
-- name: $subtitle-weight
-  value: $weight-normal
-- name: $subtitle-strong-color
-  value: $grey-darker
-- name: $subtitle-strong-weight
-  value: $weight-semibold
 ---
 
 {% capture default %}
@@ -203,7 +182,7 @@ variables:
       </div>
     </div>
 
-    {% include variables.html element=true %}
+    {% include variables.html type='element' %}
 
   </div>
 </section>