devboy-core vs devboy-executor vs devboy-cli

Core traits, types, and error handling for devboy-tools — Provider, IssueProvider, MergeRequestProvider, configuration model.

Tool execution engine for devboy-tools — provider factory, enrichment pipeline, typed output. Wires every devboy provider into a uniform tool surface.

Command-line interface for devboy-tools — `devboy` binary. Primary distribution is npm (@devboy-tools/cli); `cargo install devboy-cli` is the secondary channel.