Add an incompleteTypes > implicitGenerics fixer for functions

### 🚀 Feature Request

React's `useState` is a common example of this, but generally some functions may need a generic explicitly stated:

```ts
const [name, useName] = useState();
```

#### Existing Behavior

No such considerations exist in TypeStat.

#### Change Proposal

Similar to class and variable implicit generic inferences, there should also be one for functions.