chore(css): Move CSS files to src directory

src/components/Editor.vue

@@ -786,11 +786,11 @@ export default {
 </style>
 
 <style lang="scss">
-	@import './../../css/style';
-	@import './../../css/print';
+	@import './../css/style';
+	@import './../css/print';
 
 	.text-editor__wrapper {
-		@import './../../css/prosemirror';
+		@import './../css/prosemirror';
 
 		&:not(.is-rich-editor) .ProseMirror {
 			pre {

src/components/HelpModal.vue

@@ -296,7 +296,7 @@ export default {
 		}
 	}
 
-	@import '../../css/prosemirror';
+	@import '../css/prosemirror';
 
 	div.ProseMirror {
 		display: inline;

src/components/RichTextReader.vue

@@ -79,8 +79,8 @@ export default {
 </script>
 
 <style lang="scss">
-	@import './../../css/prosemirror';
-	@import './../../css/print';
+	@import './../css/prosemirror';
+	@import './../css/print';
 
 	@media print {
 		// Hide Content behind modal, this also hides the sidebar if open