Add multiinput scenario

- InputView using viewcommands and has event for text change.
- Experimental way to handle tab navigation in a layout views.
- New viewcommands for tab navigation and moving cursor.
- Mouse click takes focus in AbstractView if no view command
  binding.
- MultiInputViewScenario now shows tab navigation.
- Fixes #917

spring-shell-docs/src/test/java/org/springframework/shell/docs/InputViewSnippets.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2023 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.docs;
+
+import org.springframework.shell.component.view.control.InputView;
+
+class InputViewSnippets {
+
+	class Dump1 {
+
+		@SuppressWarnings("unused")
+		void dump1() {
+			// tag::sample[]
+			InputView input = new InputView();
+			String text = input.getInputText();
+			// end::sample[]
+		}
+	}
+
+}