Function reactive

reactive<T>(target): UnwrapNestedRefs<T>
Returns a reactive proxy of the object.

The reactive conversion is "deep": it affects all nested properties. A reactive object also deeply unwraps any properties that are refs while maintaining reactivity.
Type Parameters
- T extends object
Parameters
- target: T
  The source object.
Returns UnwrapNestedRefs<T>
Example
```
const obj = reactive({ count: 0 })
```