feat(main): add small comment

src/main/java/eirb/pg203/Main.java

@@ -24,6 +24,9 @@ public class Main {
 	 */
 	private Main() {};
 
+	/**
+	 * Parsing option, in the main class because we wanted to keep the weather package clean (without class that is not used by the code for the weather app)
+	 */
 	private static class Option {
 		String flag, value;
 		public Option(String flag, String value){