chore: update readme

README.md

@@ -1,5 +1,54 @@
 # @vueuse/reactified
 
+**WIP**
+
 Reactive utility wrappers powered by [`reactify`](https://vueuse.js.org/?path=/story/utilities--reactify) in [`VueUse`](https://github.com/antfu/vueuse)
 
-> WIP
+## Install
+
+```bash
+npm i @vueuse/reactified
+```
+
+## Usage
+
+```js
+import { sqrt, pow, sum, sin, round } from '@vueuse/reactified/math'
+import { toString, toUpperCase } from '@vueuse/reactified/string'
+import { parseInt, parseFloat } from '@vueuse/reactified/number'
+import { stringify, parse } from '@vueuse/reactified/json'
+import { isFalsy } from '@vueuse/reactified/boolean'
+import { log } from '@vueuse/reactified/console'
+```
+
+## Example
+
+```js
+import { ref } from 'vue'
+import { log } from '@vueuse/reactified/console'
+import { sqrt, pow, sum } from '@vueuse/reactified/math'
+import { stringify, parse } from '@vueuse/reactified/json'
+
+// Math       _________
+//       c = √ a² + b²
+const a = ref(3)
+const b = ref(4)
+const c = sqrt(sum(pow(a, 2), pow(b, 2)))
+log(c) // 5
+
+a.value = 5
+b.value = 12
+log(c) // 13
+
+
+// JSON
+//
+const obj = ref({ foo:'bar' })
+const str = stringify(obj)
+const clone = parse(str)
+
+log(str) // {"foo":"bar"}
+
+obj.value.no = 42
+log(str) // {"foo":"bar","no":42}
+```