chore(markdown): Update option docs

markdown/dev/reference/api/config/options/bool/en.md

@@ -0,0 +1,26 @@
+---
+title: boolean
+---
+
+For options where the choice is either `true` or `false`, **on** or **off**,
+or **yes** or **no**, use a boolean option.
+
+## Structure
+
+A boolean option is a plain object with these properties:
+
+ - `bool` : Either `true` or `false` which will be the default
+ - `hide` <small>(optional)</small> : A method to [control the optional display of the option][hide]
+
+[hide]: /reference/api/config/options#optionally-hide-options-by-configuring-a-hide-method
+
+## Example
+
+```js
+options: {
+  withLining: { 
+    bool: true 
+  }
+}
+```
+