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/_data/variables/elements/icon.json

@@ -0,0 +1,30 @@
+{
+  "dir_name": "elements",
+  "file_name": "icon",
+  "file_relative_path": "elements/icon.sass",
+  "file_line_from": 1,
+  "file_line_to": 4,
+  "file_url": "https://github.com/jgthms/bulma/blob/master/sass/elements/icon.sass#L1,L4",
+  "vars": {
+    "icon-dimensions": {
+      "id": "icon-dimensions",
+      "name": "$icon-dimensions",
+      "value": "1.5rem"
+    },
+    "icon-dimensions-small": {
+      "id": "icon-dimensions-small",
+      "name": "$icon-dimensions-small",
+      "value": "1rem"
+    },
+    "icon-dimensions-medium": {
+      "id": "icon-dimensions-medium",
+      "name": "$icon-dimensions-medium",
+      "value": "2rem"
+    },
+    "icon-dimensions-large": {
+      "id": "icon-dimensions-large",
+      "name": "$icon-dimensions-large",
+      "value": "3rem"
+    }
+  }
+}