[v6] dotnet format don't respect --include option

Hi,
I'm the maintainer of [Husky.Net](https://github.com/alirezanet/Husky.Net) tool, In big projects using dotnet-format is a real pain, it takes a lot of time to complete. This is one of the reasons that I created Husky.Net. usually, people only want to format changed files( or staged files). In the previous versions (e.g v5) we could've easily limited the dotnet-format working area to the specific files using `--include` but in the last version looks like dotnet-format doing something else in the background and don't respect that option.

```shell
dotnet format --include folder/targetFile.cs folder/targetFile2.cs
```
The expected behavior is ignoring everything else except the target files. or providing an option to change its behavior.
This issue makes dotnet-format v6 almost unusable, how can I fix this problem or change its behavior?
Thank you