Support scoping validation to changed lines only

[Pretasoc]

There is already a ScopeToPullRequest option, but I have a particular repository where it would be beneficial to validate only the changed lines.

One file in the project receives regular updates and contains conditional compilation blocks that "hide" certain if statements depending on the platform. For example:

#if NET5_0_OR_GREATER
if (OperatingSystem.IsWindows())
{
#endif
    DoStuff();
#if NET5_0_OR_GREATER
}
#endif

This code cannot pass format checking when targeting frameworks both below and above .NET 5. Since this isn't a simple function call in my actual code (and I would prefer not to extract it into a separate method solely to satisfy formatting requirements), I would like the validation tasks to ignore such formatting issues when the affected lines have not changed.

[ajeckmans]

This is a good suggestion and I think it is doable.

However currently there are some stability issues with the extension, where the endpoint it uses to get the project information sometimes returns an invalid response breaking the extension.
I will have to deal with that first.

If you feel up to it, you can open a PR and add the needed changes to https://github.com/ajeckmans/format-check-task/blob/e586079bd09dfe671c30bb86e1aedbc247f6f2bb/src/format-check/scripts/format-check.ts#L51C1-L72C6
I think if you extend the PullRequestFileChanges object to also include the ranges of the changes, then in the code I linked you can add an additional option that scopes the annotatedreports to only the actual lines changed.

[Pretasoc]

I will have a look at it at the weekend,

[ajeckmans]

I did push a change today that maybe also addresses this issue.