fix(matcher): fix wrongly ignored paths

[TaKO8Ki]

Summary

closes #856

When specific file or directory names are specified, it's necessary to check if they are included in the source path by traversing back through the path's ancestors. In my implementation, I use ends_with. This ends_with accurately recognizes paths, and in cases like the following, it will return false as expected:

let path = Path::new("src");
assert!(!path.ends_with("rc"));

https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=33143b2b647a15d2424b2187a6411fbc

The documentation of Path::ends_with: https://doc.rust-lang.org/std/path/struct.Path.html#method.ends_with

Test Plan

I've added a test case for single file or directory name listed in .gitignore. All tests should pass.

[TaKO8Ki]

If it's better to try #847, I'm considering introducing the ignore crate.

[ematipico]

I think we can land this fix for now.

After the release, we could start migrating to use the ignore crate. This will take more work because we want to make sure it works with the CLI, the Workspace and the memory file system we use for testing