Add better support for modified option names

- Longnames in a command option if modified via
  name modifier didn't provide enough backmapping
  info for command execution experience being accurate.
- Add new getLongNamesModified() into CommandOption
  which is populated if name modifier is used.
- Add more hints in CommandExecution for modified
  option names.
- This should bring annotation
  and programmatic commands up to date.
- Backport #777
- Fixes #782

spring-shell-samples/src/main/java/org/springframework/shell/samples/e2e/OptionNamingCommands.java

@@ -28,12 +28,13 @@ public class OptionNamingCommands {
 	public static class LegacyAnnotation extends BaseE2ECommands {
 
 		@ShellMethod(key = LEGACY_ANNO + "option-naming-1", group = GROUP)
-		public void testOptionNaming1Annotation(
+		public String testOptionNaming1Annotation(
 			@ShellOption("from_snake") String snake,
 			@ShellOption("fromCamel") String camel,
 			@ShellOption("from-kebab") String kebab,
 			@ShellOption("FromPascal") String pascal
 		) {
+			return String.format("snake='%s' camel='%s' kebab='%s' pascal='%s' ", snake, camel, kebab, pascal);
 		}
 
 	}
@@ -65,10 +66,16 @@ public class OptionNamingCommands {
 				.withOption()
 					.longNames("arg1")
 					.nameModifier(name -> "x" + name)
-					.required()
+					// .required()
 					.and()
 				.withTarget()
-					.consumer(ctx -> {})
+					.function(ctx -> {
+						String snake = ctx.getOptionValue("from_snake");
+						String camel = ctx.getOptionValue("fromCamel");
+						String kebab = ctx.getOptionValue("from-kebab");
+						String pascal = ctx.getOptionValue("FromPascal");
+						return String.format("snake='%s' camel='%s' kebab='%s' pascal='%s' ", snake, camel, kebab, pascal);
+					})
 					.and()
 				.build();
 		}