Separate interactive and non-interactive commands

- Add new ShellContext concept which now is just a way
  to stash info about interaction mode where ShellRunner
  can update supported mode.
- ShellMethod has a new field interactionMode which user
  can use to define commands between interactive/non-interactive
  modes which then prevents CommandRegistry to show
  commands at runtime.
- Fixes #345

spring-shell-standard-commands/src/main/java/org/springframework/shell/standard/commands/Clear.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2021 the original author or authors.
+ * Copyright 2017-2022 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.
@@ -18,6 +18,7 @@ package org.springframework.shell.standard.commands;
 
 import org.jline.utils.InfoCmp;
 
+import org.springframework.shell.context.InteractionMode;
 import org.springframework.shell.standard.AbstractShellComponent;
 import org.springframework.shell.standard.ShellComponent;
 import org.springframework.shell.standard.ShellMethod;
@@ -47,7 +48,7 @@ public class Clear extends AbstractShellComponent {
 	public Clear() {
 	}
 
-	@ShellMethod("Clear the shell screen.")
+	@ShellMethod(value = "Clear the shell screen.", interactionMode = InteractionMode.INTERACTIVE)
 	public void clear() {
 		getTerminal().puts(InfoCmp.Capability.clear_screen);
 	}

spring-shell-standard-commands/src/main/java/org/springframework/shell/standard/commands/Quit.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 the original author or authors.
+ * Copyright 2017-2022 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.
@@ -17,6 +17,7 @@
 package org.springframework.shell.standard.commands;
 
 import org.springframework.shell.ExitRequest;
+import org.springframework.shell.context.InteractionMode;
 import org.springframework.shell.standard.ShellComponent;
 import org.springframework.shell.standard.ShellMethod;
 
@@ -41,7 +42,7 @@ public class Quit {
 	 */
 	public interface Command {}
 
-	@ShellMethod(value = "Exit the shell.", key = {"quit", "exit"})
+	@ShellMethod(value = "Exit the shell.", key = {"quit", "exit"}, interactionMode = InteractionMode.INTERACTIVE)
 	public void quit() {
 		throw new ExitRequest();
 	}

spring-shell-standard-commands/src/main/java/org/springframework/shell/standard/commands/Stacktrace.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2021 the original author or authors.
+ * Copyright 2017-2022 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.
@@ -16,6 +16,7 @@
 package org.springframework.shell.standard.commands;
 
 import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.shell.context.InteractionMode;
 import org.springframework.shell.result.ThrowableResultHandler;
 import org.springframework.shell.standard.AbstractShellComponent;
 import org.springframework.shell.standard.ShellComponent;
@@ -49,7 +50,9 @@ public class Stacktrace extends AbstractShellComponent {
 		this.throwableResultHandler = throwableResultHandler;
 	}
 
-	@ShellMethod(key = ThrowableResultHandler.DETAILS_COMMAND_NAME, value = "Display the full stacktrace of the last error.")
+	@ShellMethod(key = ThrowableResultHandler.DETAILS_COMMAND_NAME,
+			value = "Display the full stacktrace of the last error.",
+			interactionMode = InteractionMode.INTERACTIVE)
 	public void stacktrace() {
 		if (throwableResultHandler.getIfAvailable().getLastError() != null) {
 			throwableResultHandler.getIfAvailable().getLastError().printStackTrace(getTerminal().writer());