docs(agent): bump create-runtime-rule to topic v2

The recipe gained a whole section it never had — the `.tests/` layout, the
directory-per-case shape, and the bucket naming — while its header still
said v1. Every other recipe that changed materially bumped: create-sg-rule
is v4, create-vale-rule v3, improve-rule v4.

The number is maintained by hand, so nothing else would have caught it, and
a stale `topic vN` is exactly the failure CLAUDE.md records: an agent
followed a recipe from an old `dist/` and authored rules against outdated
guidance, missing the revision that documented the field it then got wrong.

Deliberately NOT bumping `verify-rule`, whose change in this branch names
the fixture buckets inside an existing row. The test there is whether acting
on the stale copy is wrong, not whether the text differs: an agent reading
the old verify-rule still learns runtime tests are not run locally, which
remains true. An agent reading the old create-runtime-rule learns nothing
about fixtures at all and invents a layout.

Found by the review on #225.

Author: theCodeDrift

packages/cli/src/agent/create-runtime-rule.txt

@@ -1,4 +1,4 @@
-# Topic: create-runtime-rule     (CLI v%(CLI_VERSION)s / topic v1)
+# Topic: create-runtime-rule     (CLI v%(CLI_VERSION)s / topic v2)
 
 ## You are here
 This is `create-runtime-rule`. It helps you write a runtime rule: a