Optimization in Index and api .ts both in CLI

[CodingRule]

In index.ts, the code has been refactored for improved consistency, and error handling. It now utilizes asynchronous operations more effectively, resulting in a cleaner and well-structured code.

In api.ts, optimizations include organized imports, simplified boolean checks, and enhanced function signatures. Asynchronous operations have been handled more efficiently, contributing to better code clarity.