change config path search support

[clach04]

Still support home for root, and current dir.

Also xdg home

os.environ.get(
    "XDG_CONFIG_HOME", os.path.expanduser("~/.config/"),
)

os.environ.get(
"XDG_CONFIG_HOME", os.path.expanduser("~/.config/puren_tombo"),
)

• https://github.com/clach04/puren_tonbo/blob/main/puren_tonbo/__init__.py#L2298

• puren_tonbo/puren_tonbo/__init__.py

  Line 2298 in 7d1f629

  default_config_dirname = os.environ.get('HOME', os.environ.get('USERPROFILE')) # TODO consider os.path.expanduser("~") and for Windows My Documents

• puren_tonbo/puren_tonbo/__init__.py

  Line 2309 in 7d1f629

  dirs_to_search = dirs_to_search or ['.', default_config_dirname]