Each generator is now a standalone Go module with its own go.mod:
TOOLS/
├── yaml-generator/ ← service_spec_gen (API → YAML)
├── resource-generator/ ← gen_v2 (YAML → Go resources)
├── docs-generator/ ← docs_template_gen_v2 (YAML → Markdown)
├── ops-generator/ ← ops_docs_gen (ops documentation)
└── bin/ ← pre-built binaries
All scripts updated to use TOOLS/bin/* binaries.
Removed old universal_rebuild/tools/ and universal_rebuild/bin/.
