feat(tools): add output_clear and diagnostics_binding_errors tools

[CalvinAllen]

Description

Add missing output/diagnostics tools for clearing output panes and extracting XAML binding errors.

Tools to Implement

Tool	Description
output_clear	Clear the content of a VS Output window pane
diagnostics_binding_errors	Extract XAML/WPF binding errors from the Debug output pane

Notes

• Extends existing diagnostics tools category
• diagnostics_binding_errors is particularly useful for WPF/XAML development
• Competitor reference: Unofficial VS MCP Server by dhq-boiler