(#1311) Upgrade Astro via choco-theme 2.7.0

[st3phhays]

Description Of Changes

This updates choco-theme packages to 2.7.0. Included in this release is an upgrade to the version of Astro to 6.x. With the upgrade to Astro, many files needed to be updated due to breaking changes in the way v6 works. No apparent changes should be visible to the end user, and adding the process of adding new content remains the same.

Astro now requires Node.js: >= 22.12.0.

Motivation and Context

It is best to stay up to date with dependencies' new versions to bring in new features, fixes, and security updates.

Testing

• I have previewed these changes using the Docker Container or another method before submitting this pull request.

1. Follow the testing steps on choco-theme.
2. Run the website in the Docker Container and Dev Container.

Change Types Made

• Minor documentation fix (typos etc.).
• Major documentation change (refactoring, reformatting or adding documentation to existing page).
• New documentation page added.
• The change I have made should have a video added, and I have raised an issue for this.
  • Issue #

Change Checklist

• Requires a change to menu structure (top or left-hand side)/
• Menu structure has been updated
• Images added to the img repository?
  • PR -
• All items are complete on the Definition of Done.

Related Issue

• PROJ-2780
• Update choco-theme to 2.7.0 #1311