Add global variables store using Zustand

src/frontend/src/stores/globalVariables.ts

@@ -0,0 +1,9 @@
+import { create } from "zustand";
+import { GlobalVariablesStore } from "../types/zustand/globalVariables";
+
+const useGlobalVariablesStore = create<GlobalVariablesStore>((set, get) => ({
+  globalVariables: [],
+  setGlobalVariables: (variables) => {
+    set({ globalVariables: variables });
+  },
+}));

src/frontend/src/types/zustand/globalVariables/index.ts

@@ -0,0 +1,4 @@
+export type GlobalVariablesStore = {
+  globalVariables: Array<string>;
+  setGlobalVariables: (variables: Array<string>) => void;
+};