Add control over including embeds in search response in ContentSearch and ContentPicker

[cr0ybot]

Description of the Change

This PR allows for control over whether the search results in the ContentSearch component should include embeddings in the response via the new includeEmbeds prop and passes that embedded object through the NormalizedSearchResults to the renderItem and renderItemType functions.

This allows for greater customization of the search results than what is currently provided in the normalized results without needing to perform additional API requests. This allows any standard field included in an embedded response to be used, enabling things like showing the publish date for instance.

The ContentSearch and ContentPicker components have been updated to accept the includeEmbeds prop, as well as the QueryArgs interface. Both the content-search-example and content-picker-example blocks have been updated to demonstrate result customization.

Here is the content search example that has been updated to include the post date:

Note that _embed: true is currently part of the post search query but the embeds are not passed through, both because normalizeResults does not currently process it but also because the fields requested don't allow for _links and _embedded in the response. This change controls both of these aspects, and by default does not include embeds.

Closes #395

How to test the Change

1. Verify that both the content search and content picker example blocks display publish date under the type label
2. Verify that both components work as they did before the change when includeEmbeds is not passed

Changelog Entry

Added - New includeEmbeds prop for ContentSearch and ContentPicker components

Credits

Props @cr0ybot

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added Critical Flows, Test Cases, and/or End-to-End Tests to cover my change.
• All new and existing tests pass.

I'm opening the PR for review because I'm admittedly new to cypress and I'm not sure how to run the integration tests, but the tests have been updated (I don't think they would have been working before).

[cr0ybot]

I've synced the branch with develop, let me know if there's anything else I need to do to have this considered for inclusion.