chore(repo): clean root and move docs

- Move docs to docs/; keep areas for prompts only
- Relocate Makefile to scripts/Makefile; update docs to use it
- Move ci.Dockerfile to docker/ci.Dockerfile; update compose
- Move commitlint config to .config and update hook
- Remove root AGENTS.md (use area AGENTS.md)

scripts/commitlint-hook

@@ -6,5 +6,4 @@ MSG_FILE="${1:-.git/COMMIT_EDITMSG}"
 # Run commitlint inside the CI container against the commit message file
 docker compose -f docker/ci.compose.yml run --rm \
   -e IN_CI_CONTAINER=1 \
-  ci bash -lc "commitlint --edit ${MSG_FILE}"
-
+  ci bash -lc "commitlint --config .config/commitlint.config.cjs --edit ${MSG_FILE}"