feat(hooks): add ultrawork-mode hook for automatic agent orchestration guidance

When "ultrawork" or "ulw" keyword is detected in user prompt:
- Injects ULTRAWORK_CONTEXT with agent-agnostic guidance
- Executes AFTER CC hooks (UserPromptSubmit etc.)
- Follows existing hook pattern (think-mode style)

Key features:
- Agent orchestration principles (by capability, not name)
- Parallel execution rules
- TODO tracking enforcement
- Delegation guidance

Closes #31

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/hooks/index.ts

@@ -13,3 +13,4 @@ export { createClaudeCodeHooksHook } from "./claude-code-hooks";
 export { createRulesInjectorHook } from "./rules-injector";
 export { createBackgroundNotificationHook } from "./background-notification"
 export { createAutoUpdateCheckerHook } from "./auto-update-checker";
+export { createUltraworkModeHook } from "./ultrawork-mode";