feat(tools): Update dashboards with jsonpath

[ioanarm]

Related to #101

This PR introduces more efficient dashboard update capabilities using JSONPath-based patch operations, addressing context window management for large dashboards.

Ops.Dashboard.Jsonpath.Demo.mp4

Key Features

• Patch-based Dashboard Updates: Added support for targeted dashboard modifications using JSONPath expressions ($.title, $.panels[0].targets[0].expr, etc.)
• Context Window Optimization: New tools to reduce memory usage when working with large dashboards:
  get_dashboard_summary - Compact dashboard overview without full JSON
  get_dashboard_property - Extract specific dashboard parts using JSONPath

Benefits

• Significantly reduced context window usage for dashboard operations
• More efficient updates for small changes (no need to send full dashboard JSON)
• Better performance when working with large, complex dashboards
• Maintains backward compatibility with existing full-dashboard update workflows

[Copilot]

Pull Request Overview

This PR introduces efficient dashboard update capabilities using JSONPath-based patch operations to address context window management for large dashboards. The implementation provides targeted dashboard modifications without requiring full dashboard JSON, significantly reducing memory usage.

Key changes:

• Added patch-based dashboard updates using JSONPath expressions for specific dashboard modifications
• Introduced context window optimization tools (get_dashboard_summary, get_dashboard_property) for working with large dashboards
• Enhanced the update_dashboard function to support both full JSON and patch operation modes

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tools/dashboard.go	Core implementation of patch operations, JSONPath handling, and new dashboard tools for context optimization
tools/dashboard_test.go	Comprehensive test coverage for new patch operations and context management tools
tests/dashboards_test.py	Python integration tests demonstrating patch-based dashboard updates
go.mod	Added jsonpath library dependency
README.md	Updated documentation describing new features and context window management strategies