New design for the widgets section in the docs (#866)

* Initial commit for the new widgets section

* Placing all the widgets and refining the CSS and Hugo logic

* Initial commit for the new widgets section

* Placing all the widgets and refining the CSS and Hugo logic

* Rebased and updated the info according to @verythorough contribution

* Fixing the yaml codes for the relation and select widget sections

* Merging with widgets.md and app.j

* Fixing some silly mistakes (sorry!)

* Following @verythorough contributions :)

* Adding the markdown widget and fixing the widgets container background

* Adding the URL functionality and myself as a contributor :)

* Adding myself as a contributor :)

website/site/content/docs/widgets/boolean.md

@@ -0,0 +1,20 @@
+---
+label: "Boolean"
+target: "boolean"
+type: "widget"
+---
+
+### Boolean
+
+The boolean widget translates a toggle switch input to a true/false value.
+
+- **Name:** `boolean`
+- **UI:** toggle switch
+- **Data type:** boolean
+- **Options:**
+  - `default`: accepts `true` or `false`; defaults to `false`
+- **Example:**
+
+  ```yaml
+  - {label: "Draft", name: "draft", widget: "boolean", default: true}
+  ```