refactor(scss): vendors variables import

Author: xidedix

src/scss/vendors/_variables.scss

@@ -1,4 +1,4 @@
 // Override Boostrap variables
 @import "../variables";
-@import "node_modules/bootstrap/scss/mixins";
-@import "node_modules/@coreui/coreui/scss/variables";
+@import "~bootstrap/scss/mixins";
+@import "~@coreui/coreui/scss/variables";