feat(spec): lift spec/EARS/todos into cecli.spec

Move workspace todos, EARS lint/index/trace, spec generate/refine,
implement focus, and agent todo linking from BrightVision into a
standalone cecli.spec package with SpecTurnRunner protocol for HTTP glue.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: JessicaMulein

cecli/spec/__init__.py

@@ -0,0 +1,12 @@
+"""Spec-driven development: EARS, workspace todos, generate/refine, implement focus."""
+
+from cecli.spec.ears import analyze_requirements, analyze_traceability, build_spec_index
+from cecli.spec.jobs import SpecGenerationJob, spec_gen_timeout_s
+
+__all__ = [
+    "SpecGenerationJob",
+    "analyze_requirements",
+    "analyze_traceability",
+    "build_spec_index",
+    "spec_gen_timeout_s",
+]