* add new codemirror helpers

* adding json helpers to the secret pages

* mark the edit button / link as the edit element instead of the json toggle

* add acceptance tests for JSON editing

* add redirect for /intro/index.html, remove old unused redirects file

* adjust redirect link

specify node version

As the CLI client is initialized with a specific Vault address, is makes
sense to use the pooled HTTP client here. This will prevent setting up
new TCP sessions for each API call that the client needs to make.

Fix two problems with entity alias updating

* Fix panic when storage value is nil

* Ensure the value is at least of expected length

* Format correction

* Address review feedback

* include babel polyfill in the build

* submit not sumbit

This will handle patterns of the form:
  `^plugins/catalog/(?P<type>auth|database|secret)/(?P<name>.+)$`

Fixes #5701