fix: remove monorepo

app/styles/z-index.scss

@@ -0,0 +1,33 @@
+$zIndexMax: 999;
+
+.z-logo {
+  z-index: $zIndexMax - 1;
+}
+
+.z-sidebar {
+  z-index: $zIndexMax - 2;
+}
+
+.z-port-dropdown {
+  z-index: $zIndexMax - 3;
+}
+
+.z-iframe-overlay {
+  z-index: $zIndexMax - 4;
+}
+
+.z-prompt {
+  z-index: 2;
+}
+
+.z-workbench {
+  z-index: 3;
+}
+
+.z-file-tree-breadcrumb {
+  z-index: $zIndexMax - 1;
+}
+
+.z-max {
+  z-index: $zIndexMax;
+}