fix: Fix file handle and HTTP response resource leaks

[lxcxjxhx]

Description

This PR fixes resource leaks in file handle and HTTP response handling:

1. setup.py: Fixed unclosed file handle when reading README.md

   • Before: long_description=open('README.md').read()
   • After: Used with statement for proper cleanup

2. src/utils/common.py: Fixed unclosed HTTP response in create_github_issue()

   • Before: content = _urllib.request.urlopen(request, timeout=settings.TIMEOUT).read()
   • After: Store response object, read content, then explicitly close

Type of change

• Bug fix
• New feature
• Breaking change
• Documentation update

Testing

Tested with Python 3.11 on Windows 11:

• Verified setup.py can read README.md correctly
• Verified HTTP response is properly closed after reading
• No ResourceWarning messages during execution

Impact

• Prevents file handle leaks during package installation
• Prevents HTTP connection leaks in error reporting
• Follows Python PEP 343 best practices for resource management

[stasinopoulos]

Hi @lxcxjxhx and thanks for the contribution!

I'll review the changes in more detail over the next few days and, if everything looks good, I'll proceed with the merge.

One minor note regarding the PR description: I think "resource management improvements" would be a more accurate description than "resource leak fixes", since the previous implementation was generally cleaned up by Python as well.

Also, the PEP 343 reference only applies to the setup.py change, as the HTTP response is explicitly closed rather than managed via a context manager.