refactor(omo-codex): rename ultragoal component to ulw-loop

Fully rename the ultragoal component to ulw-loop so the identifier
matches the ulw-loop skill it powers. Renames the component directory,
nested skill, TS identifiers (UlwLoop / ULW_LOOP_* / ulwLoop*), the
omo ulw-loop CLI subcommand, the .omo/ulw-loop state directory, the
OMO_ULW_LOOP_STEER directive token, and the @code-yeongyu/codex-ulw-loop
package. Also threads Atlas-style right-sized parallel worker delegation
and a Prometheus-style QA + maximum-parallelism plan into the ulw-loop
skill, with a critical post-subagent QA gate.

Updates aggregate wiring (plugin package components, hooks.json,
sync-skills), the install-codex agent-link test fixture, and user docs.

packages/omo-codex/plugin/hooks/hooks.json

@@ -45,9 +45,9 @@
 				"hooks": [
 					{
 						"type": "command",
-						"command": "node \"${PLUGIN_ROOT}/components/ultragoal/dist/cli.js\" hook user-prompt-submit",
+						"command": "node \"${PLUGIN_ROOT}/components/ulw-loop/dist/cli.js\" hook user-prompt-submit",
 						"timeout": 10,
-						"statusMessage": "checking OMO ultragoal steering"
+						"statusMessage": "checking OMO ulw-loop steering"
 					}
 				]
 			}
@@ -58,7 +58,7 @@
 				"hooks": [
 					{
 						"type": "command",
-						"command": "node \"${PLUGIN_ROOT}/components/ultragoal/dist/cli.js\" hook pre-tool-use",
+						"command": "node \"${PLUGIN_ROOT}/components/ulw-loop/dist/cli.js\" hook pre-tool-use",
 						"timeout": 5,
 						"statusMessage": "enforcing OMO unlimited goal budget"
 					}