A Rust library to search files based on the name pattern (regex, wildcard, exact).
Use `FileNamed` to search for exactly one file matching the name pattern. Returns an `Error` if none or more than one file was found.
```
FileNamed::regex("cat.*")
```
Use `FilesNamed` to find any amount of files matching the name pattern.
```
FilesNamed::wildmatch("*.txt")
```