feat: provide global variables in all components (#669)

Co-authored-by: Dominik Pschenitschni <mail@celement.de>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/669
Reviewed-by: konrad <k@knt.li>
Co-authored-by: dpschen <dpschen@noreply.kolaente.de>
Co-committed-by: dpschen <dpschen@noreply.kolaente.de>

src/styles/theme/_all.scss

@@ -1,4 +1,3 @@
-@import 'variables/all';
 @import 'theme';
 
 @import 'content';