feat: add values.schemas.json

[mathewjhan]

What was changed

Added a values-schemas-json generated by helm plugin install https://github.com/losisin/helm-values-schema-json.git && helm schema.

Why?

This is useful for some applications such as cdk8s which generates the constructs based on this schema. It may be worth adding a Github action or precommit to autogenerate this.

see: README

Checklist

1. Closes

2. How was this tested:

N/A

3. Any docs updates needed?

N/A

[CLAassistant]

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