Move webbrowser.py into pyodide-py. ### Description

Moves our webbrowser.py stub into pyodide-py. It doesn't affect users, as pyodide-py is unpacked to /lib/python3.11/ during the initialization.

We won't need `pyodide.asm.data` anymore after we merge this and #3582.
```{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).
