feat: add claude code plugin support (#1293)

Co-authored-by: Claude <noreply@anthropic.com>

packages/claude-code-plugin/commands/expand-task.md

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+Break down a complex task into subtasks.
+
+Arguments: $ARGUMENTS (task ID)
+
+## Intelligent Task Expansion
+
+Analyzes a task and creates detailed subtasks for better manageability.
+
+## Execution
+
+```bash
+task-master expand --id=$ARGUMENTS
+```
+
+## Expansion Process
+
+1. **Task Analysis**
+   - Review task complexity
+   - Identify components
+   - Detect technical challenges
+   - Estimate time requirements
+
+2. **Subtask Generation**
+   - Create 3-7 subtasks typically
+   - Each subtask 1-4 hours
+   - Logical implementation order
+   - Clear acceptance criteria
+
+3. **Smart Breakdown**
+   - Setup/configuration tasks
+   - Core implementation
+   - Testing components
+   - Integration steps
+   - Documentation updates
+
+## Enhanced Features
+
+Based on task type:
+- **Feature**: Setup → Implement → Test → Integrate
+- **Bug Fix**: Reproduce → Diagnose → Fix → Verify
+- **Refactor**: Analyze → Plan → Refactor → Validate
+
+## Post-Expansion
+
+After expansion:
+1. Show subtask hierarchy
+2. Update time estimates
+3. Suggest implementation order
+4. Highlight critical path