feat(hub-common): append id to page slugs

[tomwayson]

1. Description:

• Adds utils to append id's to slugs and parse them out again
• updates fetch for all item-backed entities to use id appended to slug (if any)
• updates site relative link for page items to include slug

NOTE: that the latter requires corresponding opendata-ui changes.

Also, 3d4529e refactors the computeLinks functions for item-backed entities to call a common computeItemLinks() in order to address this comment.

1. Instructions for testing:

2. Closes Issues: 11831

3. Updated meaningful TSDoc to methods including Parameters and Returns, see Documentation Guide

4. used semantic commit messages

5. PR title follows semantic commit format (CRITICAL if the title is not in a semantic format, the release automation will not run!)

6. updated peerDependencies as needed. CRITICAL our automated release system can not be counted on to update peerDependencies so we must do it manually in our PRs when needed. See the updating peerDependencies section of the release instructions for more details.

n/a

[github-actions]

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