[Feature] CEL library for MCP

[JimBugwadia]

Problem Statement

Managing MCP requests and responses is verbose

Solution Description

Add a CEL library to make it easy to manage MCP requests and responses

Alternatives

No response

Additional Context

No response

Research

• I have searched other issues in this repository and mine is not recorded.

[realshuting]

Is this completed https://github.com/kyverno/kyverno-authz/tree/main/pkg/cel/libs/mcp?