[schema] Add analyzeIsJsonSubSchema function

[aomarks]

Given the JSON Schemas a and b, determine whether a is a sub-schema of b, and if not explain why.

We say that a is a sub-schema of b if every JSON Schema constraint in b is also present in a at an equal or higher strictness. Examples:

• If b enforces type string OR number, then a must enforce either string, number, or string OR number.
• If b enforces maxLength 4, then a must enforce maxLength <= 4 .

[changeset-bot]

🦋 Changeset detected

Latest commit: 9a9cbfe

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@google-labs/breadboard-schema	Patch

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