Exclude `bin/` and `obj/` directory content from xml formatting

[samtrion]

Description

CSharpier appears to include files from the bin/ and obj/ directories when formatting XML files. These directories are typically used for compiled or intermediate files and should be excluded by default from formatting operations.

Steps to Reproduce

1. Run dotnet build -c Release or use a CI workflow that formats all files.
2. Observe that XML files in bin/ or obj/ directories are being reported as not formatted.

Expected Behavior

CSharpier should automatically ignore any files in the bin/ and obj/ directories, including XML or xml-like files.

Actual Behavior

Files in bin/ and obj/, including XML files, are formatted, which may lead to unnecessary changes and CI noise.

Suggested Fix

Add a default exclusion rule for bin/ and obj/ directories.

Environment

• CSharpier version: 1.0.1
• OS: Windows
• .NET SDK: .NET 9

[belav]

From what I recall CSharpier has been excluding bin and obj folders for a while, but maybe that code is specific to c# somehow. I'll make sure this makes it into the next release.

[matheus-dll]

That's what was happening to me so...

My rebuild time was up to a lot of minutes!

It was necessary to manually delete /bin/ and /obj/ to my project compile. I even thought it was a Visual Studio issue...

Manually added /bin/ and /obj/ to .csharpierignore and it doesn't happen anymore.