refactor(workflow): rename workflow-lite-plan to workflow-lite-planex and remove standalone lite-execute

- Rename skill directory from workflow-lite-plan to workflow-lite-planex (planex = plan + execute)
- Remove standalone lite-execute command entry from command.json and analyze_commands.py
- Update all 60+ files referencing workflow-lite-plan to use workflow-lite-planex
- Update descriptions to clarify Phase 1: plan → Phase 2: execute architecture
- Remove lite-execute as standalone command from orchestrator routing tables
- Update docs (EN/ZH) to reflect unified planex naming and phase descriptions

docs/skills/claude-workflow.md

@@ -19,7 +19,7 @@
 |-------|----------|---------|
 | `workflow-plan` | Unified planning skill (4-stage workflow) | `/workflow-plan` |
 | `workflow-execute` | Agent-coordinated execution | `/workflow-execute` |
-| `workflow-lite-plan` | Lightweight quick planning | `/workflow-lite-plan` |
+| `workflow-lite-planex` | Lightweight quick planning | `/workflow-lite-planex` |
 | `workflow-multi-cli-plan` | Multi-CLI collaborative planning | `/workflow-multi-cli-plan` |
 | `workflow-tdd-plan` | TDD workflow | `/workflow-tdd-plan` |
 | `workflow-test-fix` | Test-fix workflow | `/workflow-test-fix` |
@@ -182,13 +182,13 @@ Phase 5: Completion
 
 ---
 
-### workflow-lite-plan
+### workflow-lite-planex
 
 **One-Liner**: Lightweight quick planning — Quick planning and execution for super simple tasks
 
 **Trigger**:
 ```shell
-/workflow-lite-plan <simple-task>
+/workflow-lite-planex <simple-task>
 ```
 
 **Features**:
@@ -331,7 +331,7 @@ Wave 2: Issue 6-10 → Parallel planning → Parallel execution
 ## Best Practices
 
 1. **Choose the right workflow**:
-   - Super simple tasks → `workflow-lite-plan`
+   - Super simple tasks → `workflow-lite-planex`
    - Complex features → `workflow-plan` → `workflow-execute`
    - TDD development → `workflow-tdd-plan`
    - Test fixes → `workflow-test-fix`