Feat: Use proper shell parsing for console commands

[arabcoders]

• Ported python Shlex class for better shell-style command parsing and escaping.
• Refactored command execution in src/API/System/Command.php to use the new Shlex::split() for parsing commands, improving security and reliability when handling user-provided or constructed shell commands.
• Updated GitHub Actions workflow build.yml.
• Updated container detection logic in helpers.php to respect the ONLY_ENV environment variable.
• Refactored the ProcessProgressEvent listener to use a more consistent variable naming scheme.