docs(reference): add Menu and Command IDs reference

[CalvinAllen]

Summary

Add a complete reference of ALL Visual Studio menu and command group identifiers from the VS SDK.

Contents (~600 lines)

Main Menu Bar

• Top-level menus (File, Edit, View, Project, Build, Debug, Format, Tools, Extensions, Window, Help)
• Main menu groups (IDG_VS_MM_*)

Menu Groups by Category

• File menu groups (New, Open, Save, MRU, etc.)
• Edit menu groups (Undo, Cut/Copy, Find, Go To)
• View menu groups (Windows, Navigate, Toolbars)
• Project menu groups (Add, References, Settings)
• Debug menu groups (Start, Step, Watch, Breakpoints)
• Tools menu groups (Options, External Tools, Extensions)
• Window menu groups (Layout, Navigation)
• Help menu groups

Toolbars

• Standard toolbars (Main, Standard, Debugger, Build, etc.)
• Tool window toolbars (Solution Explorer, Error List, Output, Find Results, etc.)
• Toolbar groups

Editor Menus and Groups

• Editor submenus (Bookmarks, Advanced, Outlining, IntelliSense)
• Code window groups

Cascade/Flyout Menus

• All IDM_VS_CSCD_* menus

Context Menus (Complete!)

• Solution Explorer (solution, project, folder, item)
• References (all types: package, COM, project, framework, analyzer, SDK, transitive)
• Multi-selection contexts
• Code editor
• Class View (all node types)
• Object Browser
• All tool windows
• Window management (tabs, docking, auto-hide)
• Web projects
• Miscellaneous

Special

• Menu controller IDs
• Special menus

Source

All IDs extracted from vsshlids.h in the VS SDK.

Test plan

• Verify the page renders correctly
• Verify the page appears in the Reference section of the sidebar
• Verify tables are properly formatted