Added more Dokka options

examples/src/main/kotlin/com/example/Example.kt

@@ -1,10 +1,25 @@
 package com.example
 
+/**
+ * Example class.
+ */
 class Example {
+    /**
+     * Message property.
+     */
     val message: String
+        /**
+         * Returns the message property.
+         */
         get() = "Hello World!"
 
+    /**
+     * Companion object.
+     */
     companion object {
+        /**
+         * Main function.
+         */
         @JvmStatic
         fun main(args: Array<String>) {
             println(Example().message)