Support for some node interfaces added to the product and order models.

[kidunot89]

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What does this implement/fix? Explain your changes.

• typeIds replaced by databaseId
• Adds support for the NodeWithComments interface support to the product and order types.
• Adds support for the NodeWithContentEditor and NodeWithTitle interfaces to the product types.
• Adds support for NodeWithFeaturedImage interface to the product type.
• Adds support for ContentNode and UniformResourceIdentifiable, to the product type.
• Add support for nodeByUri query for product URIs.
• CoreInterfaceQueriesTest implemented
• QL_Session_Handler upgraded. See this
• More composer scripts added.

Does this close any currently open issues?

Fixes #325

Any relevant logs, error output, GraphiQL screenshots, etc?

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Any other comments?

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Where has this been tested?

Operating System: Ubuntu 20.04

WordPress Version: 5.5