feat: add task master (tm) custom slash commands

Add comprehensive task management system integration via custom slash commands.
Includes commands for:
- Project initialization and setup
- Task parsing from PRD documents
- Task creation, update, and removal
- Subtask management
- Dependency tracking and validation
- Complexity analysis and task expansion
- Project status and reporting
- Workflow automation

This provides a complete task management workflow directly within Claude Code.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/commands/tm/add-subtask/add-subtask.md

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+Add a subtask to a parent task.
+
+Arguments: $ARGUMENTS
+
+Parse arguments to create a new subtask or convert existing task.
+
+## Adding Subtasks
+
+Creates subtasks to break down complex parent tasks into manageable pieces.
+
+## Argument Parsing
+
+Flexible natural language:
+- "add subtask to 5: implement login form"
+- "break down 5 with: setup, implement, test"
+- "subtask for 5: handle edge cases"
+- "5: validate user input" → adds subtask to task 5
+
+## Execution Modes
+
+### 1. Create New Subtask
+```bash
+task-master add-subtask --parent=<id> --title="<title>" --description="<desc>"
+```
+
+### 2. Convert Existing Task
+```bash
+task-master add-subtask --parent=<id> --task-id=<existing-id>
+```
+
+## Smart Features
+
+1. **Automatic Subtask Generation**
+   - If title contains "and" or commas, create multiple
+   - Suggest common subtask patterns
+   - Inherit parent's context
+
+2. **Intelligent Defaults**
+   - Priority based on parent
+   - Appropriate time estimates
+   - Logical dependencies between subtasks
+
+3. **Validation**
+   - Check parent task complexity
+   - Warn if too many subtasks
+   - Ensure subtask makes sense
+
+## Creation Process
+
+1. Parse parent task context
+2. Generate subtask with ID like "5.1"
+3. Set appropriate defaults
+4. Link to parent task
+5. Update parent's time estimate
+
+## Example Flows
+
+```
+/project:tm/add-subtask to 5: implement user authentication
+→ Created subtask #5.1: "implement user authentication"
+→ Parent task #5 now has 1 subtask
+→ Suggested next subtasks: tests, documentation
+
+/project:tm/add-subtask 5: setup, implement, test
+→ Created 3 subtasks:
+  #5.1: setup
+  #5.2: implement  
+  #5.3: test
+```
+
+## Post-Creation
+
+- Show updated task hierarchy
+- Suggest logical next subtasks
+- Update complexity estimates
+- Recommend subtask order