Task #142 - Add document site using sbt-microsites

* Added: doc for Option

docs/docs/option.md

@@ -0,0 +1,30 @@
+---
+layout: docs
+title: Option
+---
+
+# Option
+## Option Constructors
+Similar to `Either`, creating `Option` can expose its data instead of type.
+
+e.g.) The following code returns `Some[Int]` not `Option[Int]`.
+```scala mdoc
+Some(1)
+```
+
+Also None is None not `Option[A]`.
+```scala mdoc
+None
+```
+
+With `just-fp`,
+
+```scala mdoc
+import just.fp.syntax._
+```
+```scala mdoc
+1.some
+```
+```scala mdoc
+none[String]
+```

microsite/data/menu.yml

@@ -5,3 +5,6 @@ options:
 
   - title: Either
     url: docs/either
+
+  - title: Option
+    url: docs/option