Support --focus files passed from an input file, to enable deps command massive focus paths

[amyXia1994]

Enhancement

When the number of focus files increases to a huge scale, passing them through the --focus option is not （--focus 参数）capable and will produce an "Argument list too long" error since the length of the bash scripts and environment variables has a limited capacity. So it's necessary to support passing the focus paths through an input file.

kusion deps --focus-conf <input_file_path>