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/components/ulw-loop/hooks/hooks.json

@@ -0,0 +1,29 @@
+{
+	"hooks": {
+		"UserPromptSubmit": [
+			{
+				"hooks": [
+					{
+						"type": "command",
+						"command": "node \"${PLUGIN_ROOT}/dist/cli.js\" hook user-prompt-submit",
+						"timeout": 10,
+						"statusMessage": "checking ulw-loop steering"
+					}
+				]
+			}
+		],
+		"PreToolUse": [
+			{
+				"matcher": "^create_goal$",
+				"hooks": [
+					{
+						"type": "command",
+						"command": "node \"${PLUGIN_ROOT}/dist/cli.js\" hook pre-tool-use",
+						"timeout": 5,
+						"statusMessage": "enforcing unlimited ulw-loop budget"
+					}
+				]
+			}
+		]
+	}
+}