$XDG_CONFIG_HOME not considered on OSX

[sullrich84]

Describe the bug
$XDG_CONFIG_HOME is not considered when loading the config files.

To Reproduce

1. Define $XDG_CONFIG_HOME
2. Run k9s info

Expected behavior
$XDG_CONFIG_HOME should be considered when loading the config files.

Screenshots

echo $XDG_CONFIG_HOME
/Users/ullrichs/.dotfiles/

k9s info
 ____  __.________       
|    |/ _/   __   \______
|      < \____    /  ___/
|    |  \   /    /\___ \ 
|____|__ \ /____//____  >
        \/            \/ 

Version:           0.32.7
Config:            /Users/ullrichs/Library/Application Support/k9s/config.yaml
Custom Views:      /Users/ullrichs/Library/Application Support/k9s/views.yaml
Plugins:           /Users/ullrichs/Library/Application Support/k9s/plugins.yaml
Hotkeys:           /Users/ullrichs/Library/Application Support/k9s/hotkeys.yaml
Aliases:           /Users/ullrichs/Library/Application Support/k9s/aliases.yaml
Skins:             /Users/ullrichs/Library/Application Support/k9s/skins
Context Configs:   /Users/ullrichs/Library/Application Support/k9s/clusters
Logs:              /Users/ullrichs/Library/Application Support/k9s/k9s.log
Benchmarks:        /Users/ullrichs/Library/Application Support/k9s/benchmarks
ScreenDumps:       /Users/ullrichs/Library/Application Support/k9s/screen-dumps

Versions (please complete the following information):

• OS: OSX 14.7
• K9s: 0.32.7
• K8s: v1.31.2