feat(IO.Path.Operators): add `</>` operator

```fsharp
let () x y = Path.Combine(x, y)
```

> :warning: **Warning**
> К новому модулю `Operators` добавить `AutoOpen` attribute. Тогда операторы модуля станут доступны при открытии модуля `FsharpMyExtension.IO.Path`

Start at the FsharpMyExtension.IO.Path module and locate the new Operators module described in the issue. Add the < /> operator using Path.Combine and ensure the module has the AutoOpen attribute, then verify that opening FsharpMyExtension.IO.Path makes the operator available.

Written by the indexing model from the issue text.