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/made-with-bulma.html

@@ -84,7 +84,7 @@ images:
       </thead>
       <tbody>
         {% for image in page.images %}
-          {% assign imageUrl = "/images/made-with-bulma" | prepend: site.url }} | append: image.type | append: ".png" %}
+          {% assign imageUrl = "/images/made-with-bulma" | prepend: site.url | append: image.type | append: ".png" %}
           <tr>
             <td>{{ image.name }}</td>
             <td style="background: {{ image.bg }};"><img src="{{ imageUrl }}" alt="Made with Bulma" width="128" height="24"></td>