Add commands as list in help templating

- Add getNames method.
- Add docs for templating info and fields to help.
- Fixes #480

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

@@ -15,6 +15,7 @@
  */
 package org.springframework.shell.standard.commands;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
@@ -98,6 +99,10 @@ class CommandInfoModel {
 		return name;
 	}
 
+	public List<String> getNames() {
+		return Arrays.asList(name.split(" "));
+	}
+
 	public List<String> getAliases() {
 		return this.aliases;
 	}