Comprehensive documentation for workspaces-effect.

• Getting Started -- Installation, first example, and platform setup

• Architecture Overview -- Service groups, layers, and composition model
• Services Reference -- All 9 services with their APIs and error types

• Dependency Analysis -- Building dependency graphs and topological sorting
• Change Detection -- Git-based change detection and affected package computation
• Lockfile Parsing -- Reading lockfiles and checking integrity
• Publishability -- Detecting publishable packages and their targets

• Troubleshooting -- Common issues and solutions