use_crate_prefix_for_self_imports

### What it does

Items imported from current crate should be prefixed with `crate::`

### Advantage

- distinguish from dependencies
- Maintain consistent coding style

 Different import styles could exist at same time:

```
use crate::foo::qux;
use foo::bar;
```

### Drawbacks

None

### Example

```rust
use foo::bar;
```

Could be written as:

```rust
use crate::foo::bar;
```
