feat(companion): initial rn port scaffold

aris/store/store.ts

@@ -0,0 +1,15 @@
+import { create } from 'zustand';
+
+export interface BearState {
+  bears: number;
+  increasePopulation: () => void;
+  removeAllBears: () => void;
+  updateBears: (newBears: number) => void;
+}
+
+export const useStore = create<BearState>((set) => ({
+  bears: 0,
+  increasePopulation: () => set((state) => ({ bears: state.bears + 1 })),
+  removeAllBears: () => set({ bears: 0 }),
+  updateBears: (newBears) => set({ bears: newBears }),
+}));