Only NonInteractiveShellRunner is active on default

- Disable InteractiveShellRunner and ScriptShellRunner on default
- Enable those in commands and e2e sample apps
- Document changes
- Fixes #1017

spring-shell-samples/spring-shell-sample-e2e/src/main/resources/application.yml

@@ -2,6 +2,8 @@ spring:
   main:
     banner-mode: off
   shell:
+    interactive:
+      enabled: true
     ## pick global default option naming
     # option:
     #   naming: