Update retrieveRecord documentation for PowerApps Pages

[LucasHahne]

Added PowerApps Pages syntax and examples for retrieving records.

[LucasHahne]

@microsoft-github-policy-service agree

[learn-build-service-prod]

Learn Build status updates of commit 6aa5e49:

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[JimDaly]

@LucasHahne
I skimmed this while OOF because I want to give you a quick response.

This is the PCF API docs.
Power Pages has separate API docs.
IIRC we published new Power Pages CRUD API docs this month.

See https://learn.microsoft.com/en-us/power-pages/configure/client-api#pageswebapi-object

That would be the place for these changes.

I will review this PR in the new year.

[LucasHahne]

@JimDaly
I was looking for the underlying custom generative pages api docu, not power pages. I thought this one would fit best as I have not been able to see a dedicated one for custom generative pages. Does one like that exist yet or is it any different than the PCF API? As far as I know custom generative pages are PCFs under the hood.