move the repository skills source from `codex/skills` to `skills`.
update vendor/install_skills paths, thirdparty sync pipeline, docs, and regression tests, including deployment-route e2e coverage.
- Remove docs/tsl/syntax_book/ (superseded by docs/tsl/syntax/)
- Remove data/tsl_reference_catalog_source/ (catalog already generated
into docs/tsl/reference/catalog/, source no longer needed)
- Remove scripts/build_tsl_reference_catalog.ps1 (build script for
the above source)
- Remove test assertion that referenced the deleted data/ source index
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
remove obsolete main_language placeholders and language summary template text
limit generated .agents guidance to configured langs and normalize AGENT_RULES trailing newlines
document install_skills no_backup behavior and refresh tests for deployment links and sync flows
csh