DOCS - Prep Collate docs structure

[pmbrull]

Describe your changes:

this preps the collate navigation, some collate-specific content for SSO and the CI to sync the content to collate docs repo

The deploy keys and secrets are already created

next step is setting up Algolia and index generation

Type of change:

• Bug fix
• Improvement
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation

Checklist:

• I have read the CONTRIBUTING document.
• My PR title is Fixes <issue-number>: <short explanation>
• I have commented on my code, particularly in hard-to-understand areas.
• For JSON Schema changes: I updated the migration scripts or explained why it is not needed.