Send access path suggestions to the model editor view

[shati-patel]

If you have the relevant feature flag enabled, the model editor will now generate and load access path suggestions on start-up.

I haven't yet added logic to the webview to actually use those suggestions, but they will eventually be used to display autocomplete suggestions!

See internal linked issue for more info 🔍

Checklist

N/A

• CHANGELOG.md has been updated to incorporate all user visible changes made by this pull request.
• Issues have been created for any UI or other user-facing changes made by this pull request.
• [Maintainers only] If this pull request makes user-facing changes that require documentation changes, open a corresponding docs pull request in the github/codeql repo and add the ready-for-doc-review label there.

[koesie10]

LGTM