refactor(packages): merge timeout/ into guard/, rename cordis/ to self-modification/

git mv timeout-policy beside repeat-tool-guard (both are loop-hygiene
policies on the tool-execution pipeline, and the timeout/ group name
collided with util/timeout) and tool-cordis into self-modification/
(naming the role the framework name obscured). Merged/renamed group
README triplets, tsconfig globs, generator sources, hierarchy tables,
catalogs, and the timeout-policy design note's group references
follow. Adds the fifth FIXME marker (dsh-timeout-guard, recorded as a
suggestion to settle at resolution time).

guard + self-modification suites: 197 passed.

packages/guard/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/guard/README.md
-README.md: 8da2f2ddcc1432e7963e600b35549f5e26121af2
-README.zh.md: aa8b5bd1f7d10d90d1dc84d07a7aad81bfb4259c
+README.md: 5791474a2fd6aeda728d4c335c930069ade6e023
+README.zh.md: 82d779d2f1834317672b8fb03f2a4a875bb566fc