docs(typedoc): document function examples

src/functions/conditionalJoin.ts

@@ -20,6 +20,14 @@
 /**
  * Conditionally joins given strings
  *
+ * @example
+ * ```ts
+ * let isAdmin = true
+ *
+ * // prints "Hello, Administrator!"
+ * console.log(conditionalJoin(["Hello,", isAdmin ? "Administrator" : "User", "!"], " "))
+ * ```
+ *
  * @param array - strings to join
  * @param joinChar - character used to join strings
  * @returns new string