chore: import upstream snapshot with attribution

apps/sim/stores/canvas-mode/index.ts

@@ -0,0 +1 @@
+export { useCanvasModeStore } from './store'

apps/sim/stores/canvas-mode/store.ts

@@ -0,0 +1,22 @@
+import { create } from 'zustand'
+import { devtools, persist } from 'zustand/middleware'
+
+export type CanvasMode = 'cursor' | 'hand'
+
+interface CanvasModeState {
+  mode: CanvasMode
+  setMode: (mode: CanvasMode) => void
+}
+
+export const useCanvasModeStore = create<CanvasModeState>()(
+  devtools(
+    persist(
+      (set) => ({
+        mode: 'hand',
+        setMode: (mode) => set({ mode }),
+      }),
+      { name: 'canvas-mode' }
+    ),
+    { name: 'canvas-mode-store' }
+  )
+)