feat: initialize NestJS application with global error handling and response standardization
- Added nest-cli.json for NestJS configuration. - Created package.json with dependencies and scripts for building, testing, and linting. - Implemented AppController and AppService with a basic "Hello World!" response. - Introduced ContextModule and ContextService for managing request-scoped context. - Developed custom decorators for response messages and standardized error handling. - Created global exception filter to handle various error types and format responses. - Implemented response standardization interceptor to wrap successful responses. - Added middleware for generating unique request IDs. - Established DTOs for API responses and error handling. - Configured TypeScript settings for the project. - Set up Jest for testing with end-to-end test cases.
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