fix(docs): Issue 1254 guides (#1267)

* Update persisting-store-data.md

* Fix persisting-store-data.md with 'yarn run prettier'

* Add connect-to-state-with-url-hash.md
  * Remove docs from persisting-store-data.md

docs/guides/connect-to-state-with-url-hash.md

@@ -0,0 +1,48 @@
+---
+title: Connect to state with URL hash
+nav: 15
+---
+
+## State is connected with URL hash
+
+If you want to connect state of a store to URL hash, you can create your own hash storage.
+
+```ts
+import create from 'zustand'
+import { persist, StateStorage } from 'zustand/middleware'
+
+const hashStorage: StateStorage = {
+  getItem: (key): string => {
+    const searchParams = new URLSearchParams(location.hash.slice(1))
+    const storedValue = searchParams.get(key)
+    return JSON.parse(storedValue)
+  },
+  setItem: (key, newValue): void => {
+    const searchParams = new URLSearchParams(location.hash.slice(1))
+    searchParams.set(key, JSON.stringify(newValue))
+    location.hash = searchParams.toString()
+  },
+  removeItem: (key): void => {
+    const searchParams = new URLSearchParams(location.hash.slice(1))
+    searchParams.delete(key)
+    location.hash = searchParams.toString()
+  },
+}
+
+export const useBoundStore = create(
+  persist(
+    (set, get) => ({
+      fishes: 0,
+      addAFish: () => set({ fishes: get().fishes + 1 }),
+    }),
+    {
+      name: 'food-storage', // unique name
+      getStorage: () => hashStorage,
+    }
+  )
+)
+```
+
+## CodeSandbox Demo
+
+https://codesandbox.io/s/silly-fire-gsjbc7?file=/src/App.tsx