Fix hardcoded /tmp path for Unix socket in lock_files

[luckyabsoluter]

Problem:

• The lock_files function previously hardcoded /tmp as the directory for the Unix socket path.
• This causes compatibility issues on platforms or specific environments that use a different temporary directory, or even lack access to /tmp entirely.

Actions:

• Updated the X11 Unix socket path generation to dynamically use tempfile.gettempdir().

Result:

• The Unix socket path now correctly adapts to the system's runtime configuration (e.g., OS defaults or TMPDIR environment variables), improving cross-platform compatibility.

Dependency:

• Fix hardcoded /tmp path for Unix socket in unix_connect python-xlib/python-xlib#288