fix: correct bugs and typos in chart_visualization module

[Ricardo-M-L]

Summary

• Fix wrong required field referencing non-existent code parameter instead of json_path in DataVisualization
• Rename misspelled method add_insighs to add_insights
• Fix typos: invode → invoke, worksapce → workspace, visulazation → visualization, esay → easy
• Fix grammar: Successful → Successfully

Test plan

• Verify DataVisualization tool schema has correct required field
• Verify add_insights method is callable

🤖 Generated with Claude Code

[Ricardo-M-L]

Friendly bump — this fork PR's workflow run is stuck on action_required (GitHub's default for first-time contributors). Could a maintainer approve the workflow so CI can report a verdict? Thanks!