Add creational patterns, Interpreter; remove scripts; update README

01-creational/factory-method/EmailNotification.java

@@ -0,0 +1,11 @@
+package factorymethod;
+
+public class EmailNotification implements Notification {
+    private final String email;
+    public EmailNotification(String email) { this.email = email; }
+
+    @Override
+    public void send(String message) {
+        System.out.println("Email -> " + email + ": " + message);
+    }
+}