feat(watcher): implement stylesheet import tracking and refresh logic

[Rejdukien]

Watches for changes of all imported stylesheets. Handles imported styles being in different folders as well.

Sample output:

23:07:03,698     INFO: Watching directory: c:\users\rejdukien\.config\yasb
23:07:03,699     INFO: Watching directory: c:\users\rejdukien\.config\yasb\backup
23:07:03,699     INFO: Watching directory: c:\users\rejdukien\.config\someotherfolder
23:07:03,699     INFO: Created file watcher
23:07:27,581    DEBUG: Imported stylesheet modified: c:\users\rejdukien\.config\someotherfolder\someStylesheet.css
23:07:30,990    DEBUG: Stylesheet modified: c:\users\rejdukien\.config\yasb\styles.css
23:07:41,595    DEBUG: Imported stylesheet modified: c:\users\rejdukien\.config\yasb\backup\widget-copilot.css