Add CSS typings

Closes #2195

frontend/src/Components/Modal/Modal.css.d.ts

@@ -0,0 +1,15 @@
+// This file is automatically generated.
+// Please do not change this file!
+interface CssExports {
+  'extraLarge': string;
+  'large': string;
+  'medium': string;
+  'modal': string;
+  'modalBackdrop': string;
+  'modalContainer': string;
+  'modalOpen': string;
+  'modalOpenIOS': string;
+  'small': string;
+}
+export const cssExports: CssExports;
+export default cssExports;