[Feature request] Partitionate qualified and non-qualified imports

Would be great to regroup imports depending if they are qualified or not. For example,

```haskell
import A
import qualified B
```

could be transformed to:

```haskell
import A

import qualified B
```

and

```haskell
import A
import qualified B
import qualified C
import D
```

could be transformed to:

```haskell
import A
import D

import qualified B
import qualified C
```

This, in combination with these settings:

```yaml
steps:
- imports:
align: group
pad_module_names: true
```

would allow to align import lists without adding the ` qualified ` padding if they were in the same group. Also, they would look more organized.