Docs/add parse json examples

[karthikmanam]

Explanation

This PR adds clear examples for the parse_json and to_boolean functions in the JP documentation. Previously, these documentation pages only contained a placeholder "TODO" instead of actual examples, making it difficult for users to understand how to use these functions properly. This PR represents an addition to the existing documentation to improve its completeness and usefulness.

Related issue

This is a documentation improvement to address incomplete function examples. No specific issue is being fixed, but it contributes to the overall documentation quality of the project.

Proposed Changes

• Added comprehensive examples for the parse_json function showing how to:
  • Parse JSON objects and access their properties
  • Parse JSON arrays and access elements
  • Parse nested JSON structures
• Added examples for the to_boolean function demonstrating:
  • Case insensitivity (true/True/TRUE)
  • Handling of various string formats for boolean values

Checklist

• I have read the contributing guidelines.
• I have read the PR documentation guide and followed the process including adding proof manifests to this PR.