[RFC] Implement a way to construct pipes

When I need to call pipes I often end with the code like this:

```haskell
callCommand $ "git diff " <> commit <> " --color=always | diff-highlight | less -rFX"
```

I can use `$|` operator but it's not efficient. So maybe having some additional function would be useful and I can rewrite it like this:

```haskell
pipes $ "git" [commit, "--color=always"] <> "diff-highlight" [] <> "less" ["-rfX"]
```

Start by reviewing the existing `$|` operator and the `callCommand` usage shown in the issue. Define whether the proposed `pipes` form can express the `git diff | diff-highlight | less` example efficiently; done means the project has an agreed, implemented way to construct that pipeline.

Written by the indexing model from the issue text.