[Kyverno] Grammar, Parser, and Validator for Kyverno JMESPath

[nate-double-u]

Kyverno, the Kubernetes native policy engine, is designed to easily secure and automate Kubernetes configurations. Kyverno uses an extended JMESPath query language for complex JSON data processing. Kyverno extends JMESPath by allowing nested expressions and an extended set of custom functions. As Kyverno's declarative policy language has evolved its become important to provide proper tooling around embedding, syntax checking and validation of JMESPath expressions including the extensions.

Mentor(s): Jim Bugwadia (@JimBugwadia)

https://github.com/cncf/mentoring/blob/main/summerofcode/2022.md#grammar-parser-and-validator-for-kyverno-jmespath