Add release summary for v2.1.0

Author: DVC2

RELEASE-SUMMARY.md

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+# TaskTracker v2.1.0 Release Summary
+
+## Key Features
+
+- **Claude Agent Integration**: Specialized templates and batch commands for cost-efficient AI interactions
+- **Directory Reorganization**: Improved code organization with core, reporting, and integration modules
+- **Security Enhancements**: Better protection of sensitive data and expanded security testing
+- **Cost Optimization**: Advanced batch operations to reduce premium tool call costs by up to 83%
+- **Improved Documentation**: Comprehensive guides and update instructions
+
+## Installation
+
+### New Installation
+
+```bash
+# Clone the repository
+git clone https://github.com/DVC2/task_tracker.git
+
+# Install dependencies
+cd task_tracker
+npm install
+
+# Run the setup
+./bin/tasktracker setup
+```
+
+### Updating from Previous Versions
+
+```bash
+# Back up your data
+cp -r .tasktracker/ .tasktracker-backup/
+
+# Pull the latest code
+git pull
+
+# Install updated dependencies
+npm install
+
+# Verify the installation
+./bin/tasktracker verify
+```
+
+For detailed update instructions, see the [Update Guide](docs/guides/UPDATING.md).
+
+## Claude Agent Integration
+
+This version introduces optimized integration with Claude agents in Cursor IDE:
+
+```bash
+# Use batch templates to reduce premium tool call costs
+task.batch examples/claude-templates/daily-update.txt
+```
+
+Available templates:
+- `daily-update.txt` - Update multiple task statuses efficiently
+- `task-create.txt` - Create multiple related tasks
+- `pr-prepare.txt` - Prepare a task for a pull request
+
+## Documentation
+
+- [Update Guide](docs/guides/UPDATING.md) - Instructions for updating from previous versions
+- [AI Integration Guide](docs/AI-INTEGRATION.md) - Claude agent integration details
+- [Cost Optimization Guide](docs/guides/COST-OPTIMIZATION.md) - Tips for reducing premium tool call costs
+- [IDE Integration Guide](docs/ide-integrations/ide-integration.md) - IDE integration features