Uniformize folder structure (#693)

* Uniformize folder structure

* Fix icons

* Fix icons

* Fix tests

* Fix tests

front/src/utils/cookie-storage.ts

@@ -0,0 +1,25 @@
+import Cookies, { CookieAttributes } from 'js-cookie';
+
+class CookieStorage {
+  private keys: Set<string> = new Set();
+
+  getItem(key: string): string | undefined {
+    return Cookies.get(key);
+  }
+
+  setItem(key: string, value: string, attributes?: CookieAttributes): void {
+    this.keys.add(key);
+    Cookies.set(key, value, attributes);
+  }
+
+  removeItem(key: string): void {
+    this.keys.delete(key);
+    Cookies.remove(key);
+  }
+
+  clear(): void {
+    this.keys.forEach((key) => this.removeItem(key));
+  }
+}
+
+export const cookieStorage = new CookieStorage();