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.

tsconfig.base.json

@@ -101,10 +101,9 @@
         "./packages/workflow/*/src/invariant.ts",
         "./packages/web/*/src/invariant.ts",
         "./packages/spill/*/src/invariant.ts",
-        "./packages/timeout/*/src/invariant.ts",
         "./packages/todo/*/src/invariant.ts",
         "./packages/bundle/*/src/invariant.ts",
-        "./packages/cordis/*/src/invariant.ts",
+        "./packages/self-modification/*/src/invariant.ts",
         "./packages/sandbox/*/src/invariant.ts",
         "./packages/hooks/*/src/invariant.ts",
         "./packages/session/*/src/invariant.ts",
@@ -210,10 +209,9 @@
         "./packages/workflow/*/src",
         "./packages/web/*/src",
         "./packages/spill/*/src",
-        "./packages/timeout/*/src",
         "./packages/todo/*/src",
         "./packages/bundle/*/src",
-        "./packages/cordis/*/src",
+        "./packages/self-modification/*/src",
         "./packages/sandbox/*/src",
         "./packages/hooks/*/src",
         "./packages/session/*/src",