feature for import/order: move annotations with import statements

Add feature to move import statements with related annotation blocks.

Current behaviour:

before:
```
// annotation for foo import
import foo from 'foo';
import bar from 'bar';
```

after:
```
// annotation for foo import
import bar from 'bar';
import foo from 'foo';
```

expected:
```
import bar from 'bar';
// annotation for foo import
import foo from 'foo';
```

The issue names the import/order rule but no source file or test. Start by locating that rule and use the before, after, and expected examples to understand the current ordering behavior; done means related annotation blocks move with their import statements when imports are reordered.

Written by the indexing model from the issue text.