* chore: add icons and installation
* refactor: use the new battery icons
* refactor: use audio applet icons
* chore dependency cleanup
* chore: remove icons included in cosmic-icons package
* refactor: use icons for signal strength and fix handling of new connections
* fix: improve some logic for the networking applet
* chore: add cosmic-icons to Depends
* feat: use notifications icons
* chore: set bluetooth icon depending on state
* fix: set default font and text size
* feat (network): add airplane-mode message
* feat (battery): add display icons to the battery applet
* fix (battery): logic for selecting the battery icon & use new battery icons
desktop-file-validate reports that in the future file extensions with relative path files in the future will be fatal error - it seems like it was done in some files lets fix it for the rest
