readline: improve README.md with working examples

vlib/readline/README.md

@@ -6,15 +6,21 @@ from a terminal in an easy and structured manner.
 The module provides an easy way to prompt the user for
 questions or even make a REPL or an embedded console.
 
-Use `readline.Readline` if you want to include more
-advanced features such as history or simply use
-`readline.read_line('Please confirm (y/n):')` directly
-for one-off user interactions.
 
-# Usage
+# Usage:
 
-```v ignore
+```v
-import readline { Readline }
+import readline
 
-Readline.read_line('Continue?: (y/n)')
+mut r := readline.Readline{}
+answer := r.read_line('hello: ') ?
+println(answer)
+```
+
+or just:
+```v
+import readline { read_line }
+
+input := read_line('What is your name: ') ?
+println('Your name is: $input')
 ```