Support option label

- This adds `label` to `CommandOption` which is then used
  in a Help instead of type.
- Fixes #424

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

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.shell.samples.e2e;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.shell.command.CommandRegistration;
+import org.springframework.shell.standard.ShellComponent;
+
+/**
+ * Commands used for e2e test.
+ *
+ * @author Janne Valkealahti
+ */
+@ShellComponent
+public class OptionTypeCommands extends BaseE2ECommands {
+
+	@Bean
+	public CommandRegistration testOptionTypeRegistration() {
+		return CommandRegistration.builder()
+			.command(REG, "option-type")
+			.group(GROUP)
+			.withOption()
+				.longNames("arg1")
+				.and()
+			.withOption()
+				.longNames("arg2")
+				.type(String.class)
+				.and()
+			.withOption()
+				.longNames("arg3")
+				.type(int.class)
+				.and()
+			.withOption()
+				.longNames("arg4")
+				.label("MYLABEL")
+				.and()
+			.withTarget()
+				.consumer(ctx -> {})
+				.and()
+			.build();
+	}
+
+}