Function tugger_apple::find_system_xcode_developer_directories

pub fn find_system_xcode_developer_directories() -> Result<Vec<PathBuf>>

Finds all Developer directories for installed Xcode applications for system application installs.

This is a convenience method for find_system_xcode_applications() plus resolving the Developer directory and filtering on missing items.

It will return all available Developer directories for all Xcode installs under /Applications.