feat: create tm-core and apps/cli (#1093)

- add typescript
- add npm workspaces

packages/tm-core/CHANGELOG.md

@@ -0,0 +1,70 @@
+# Changelog
+
+All notable changes to the @task-master/tm-core package will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+- Initial package structure and configuration
+- TypeScript support with strict mode
+- Dual ESM/CJS build system with tsup
+- Jest testing framework with TypeScript support
+- ESLint and Prettier for code quality
+- Modular architecture with barrel exports
+- Placeholder implementations for all modules
+- Comprehensive documentation and README
+
+### Development Infrastructure
+- tsup configuration for dual format builds
+- Jest configuration with ESM support
+- ESLint configuration with TypeScript rules
+- Prettier configuration for consistent formatting
+- Complete package.json with all required fields
+- TypeScript configuration with strict settings
+- .gitignore for development files
+
+### Package Structure
+- `src/types/` - TypeScript type definitions (placeholder)
+- `src/providers/` - AI provider implementations (placeholder)
+- `src/storage/` - Storage layer abstractions (placeholder)
+- `src/parser/` - Task parsing utilities (placeholder)
+- `src/utils/` - Common utility functions (placeholder)
+- `src/errors/` - Custom error classes (placeholder)
+- `tests/` - Test directories and setup
+
+## [1.0.0] - TBD
+
+### Planned Features
+- Complete TypeScript type system
+- AI provider implementations
+- Storage adapters
+- Task parsing capabilities
+- Comprehensive utility functions
+- Custom error handling
+- Full test coverage
+- Complete documentation
+
+---
+
+## Release Notes
+
+### Version 1.0.0 (Coming Soon)
+This will be the first stable release of tm-core with complete implementations of all modules. Currently, all modules contain placeholder implementations to establish the package structure and enable development of dependent packages.
+
+### Development Status
+- ✅ Package structure and configuration
+- ✅ Build and test infrastructure
+- ✅ Development tooling setup
+- 🚧 TypeScript types implementation (Task 116)
+- 🚧 AI provider system (Task 117)
+- 🚧 Storage layer (Task 118)
+- 🚧 Task parser (Task 119)
+- 🚧 Utility functions (Task 120)
+- 🚧 Error handling (Task 121)
+- 🚧 Configuration system (Task 122)
+- 🚧 Testing infrastructure (Task 123)
+- 🚧 Documentation (Task 124)
+- 🚧 Package finalization (Task 125)