BLD Add DISTDIR variable. ### Description

Adds `DISTDIR` env variable that points to the directory where libraries should be copied to when building shared libraries with recipe.

### Checklists

- [x] Add new / update outdated documentation

```{eval-rst}
    :orphan:
```

# Micropip API

The Micropip API documentation was moved to [micropip.pyodide.org](https://micropip.pyodide.org/en/stable/project/api.html).

```{eval-rst}
    :orphan:
```

# Micropip API

The Micropip API documentation was moved to [micropip.pyodide.org](https://micropip.pyodide.org/en/stable/project/api.html).
