The refactor in 0380656d renamed src/core -> src/core-skills and
src/bmm -> src/bmm-skills but did not update the CLI installer code.
This broke `npx bmad-method install` with ENOENT errors scanning
the old directory paths. Also restores the deleted
src/utility/agent-components/ directory whose fragment templates
are still required by activation-builder.js during agent compilation.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>