benches: package as kernbench.benches, add @bench registry + list subcommand

Move benches/ -> src/kernbench/benches/ and src/kernbench/cli/probe.py ->
src/kernbench/probes/probe.py. Each bench self-registers via
@bench(name=..., description=...); kernbench list enumerates benches
with auto-assigned indices, --bench accepts kebab-case name or numeric
index. Audit at package-import time fails if any non-underscore module
forgets the decorator. ADR-0010 (EN + KO) updated to reflect the new
resolver path, list subcommand, and probes package separation.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_cli_list.py

@@ -0,0 +1,44 @@
+"""Tests for `kernbench list` subcommand and `--bench <index>` resolution."""
+from __future__ import annotations
+
+import kernbench.cli.main as cli_main
+from kernbench.benches import registry
+
+
+def test_cli_list_outputs_all_benches(capsys):
+    rc = cli_main.main(["list"])
+    assert rc == 0
+    out = capsys.readouterr().out
+    for spec in registry.list_all():
+        assert spec.name in out
+    assert "DESCRIPTION" in out
+
+
+def test_cli_run_by_index(monkeypatch):
+    """CLI accepts numeric index for --bench; same callable as the name."""
+    qkv_spec = registry.resolve("qkv-gemm")
+
+    captured = {}
+
+    def fake_run_bench(*, topology, bench_fn, device, engine_factory):
+        captured["bench_fn"] = bench_fn
+
+        class _R:
+            traces = []
+            engine = None
+
+            class completion:
+                ok = True
+
+            def summary_text(self):
+                return ""
+        return _R()
+
+    monkeypatch.setattr(cli_main, "run_bench", fake_run_bench)
+    rc = cli_main.main([
+        "run", "--topology", "topology.yaml",
+        "--bench", str(qkv_spec.index),
+        "--device", "sip:0",
+    ])
+    assert rc == 0
+    assert captured["bench_fn"] is qkv_spec.run