Logical model examples without resourceType or id

[jafeltra]

This PR adds a note to the Tips and Tricks section about logical model examples without resource type and id. I wasn't exactly sure where this should fit because it is really similar to the existing documentation. Let me know what you think.

Note: this approach is based on discussion on Zulip here.

Do not merge this PR until there is a SUSHI release that includes support for this.

[cmoesel]

This looks good and is explained clearly. Thanks!

[jafeltra]

I've updated this PR to use the current extension URL for IG resource format, since the one we had documented has been deprecated.

I've also updated it use a full canonical URL in the resourceType of our example since that is correct (SUSHI will still allow ids there, but we should document best practice). It had been bugging me for a while that our example Logical Model does not have an id element but the example Instance of it does (technically making the example invalid for that logical model), so I added an id element as well.

[cmoesel]

I've asked a question / suggested a change. Technically the example is not wrong, so I couldn't make myself select Request Changes -- but it's probably a good idea to change it anyway.

[cmoesel]

Looks good to me!