DIGITAL-141: Install Rabbit Hole module

[omerida]

Jira ticket

DIGITAL-141

Purpose

Installs and enables the rabbit hole module.
Enables the rg_node submodule
Configures the short post, source, and guide nav content types to 404 when viewed

Includes the following PRs that must be merged first

DIGITAL-47 which adds the guide nav content type.

Deployment and testing

Local Setup

lando si

QA/Testing instructions

Visit the short post, source, and guide nav nodes and confirm they show a 404 message

Checklist for the Developer

• A link to the JIRA ticket has been included above.
• No merge conflicts exist with the target branch.
• Automated tests have passed on this PR.
• A reviewer has been designated.
• Deployment and testing steps have been documented above, if applicable.

Checklist for the Peer Reviewers

• The file changes are relevant to the task objective.
• Code is readable and includes appropriate commenting.
• Code standards and best practices are followed.
• QA/Test steps were successfully completed, if applicable.
• Applicable logs are free of errors.