Craft workspace discovery supports npm/yarn/pnpm uniformly

src/utils/workspaces.ts discoverWorkspaces(rootDir) returns {type: 'npm'|'yarn'|'pnpm'|'none', packages: WorkspacePackage[]}. Tries pnpm-workspace.yaml first (more specific), then package.json workspaces field (array or {packages: []} object form). npm vs yarn is distinguished by presence of yarn.lock. Each WorkspacePackage carries name, absolute location, private, hasPublicAccess (publishConfig.access === 'public'), and workspaceDependencies (deps that reference other workspace packages by name — across dependencies/peer/optional, not dev). NpmTarget.expand uses this to auto-generate per-package target configs, filters private packages, validates public→private deps, and topologically sorts via topologicalSortPackages (depth-based, detects cycles). Artifact filenames generated via packageNameToArtifactPattern or a user artifactTemplate with {{name}}/{{simpleName}}/{{version}}.