refactor: improve GitHub issue counter readability and error handling

[pradipgirhe]

Description

Summary

Refactored the GitHub issue counter CLI to improve code readability, maintainability, and API request handling.

Changes Made

• Added BASE_URL constant for cleaner API management
• Refactored query creation into a separate build_query() function
• Replaced manual URL concatenation with params=params
• Added timeout handling for API requests
• Added response.raise_for_status() for improved HTTP error handling
• Improved overall code structure and readability
• Fixed typo-related issue in error handling

Benefits

• Cleaner and more maintainable code
• Better separation of concerns
• Improved reliability for API requests
• More production-ready CLI structure

Testing

Tested successfully using:

python3 cghi.py microsoft vscode

Output example:

Open issues found: 15591

Fixes #2014