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- [x] Add new / update outdated documentation

from pytest_pyodide import run_in_pyodide


@run_in_pyodide(
    packages=[
        "rebound",
        "numpy",
    ]
)
def test_integrate(selenium):
    import numpy
    import rebound

    sim = rebound.Simulation()
    sim.add(m=1)
    sim.add(m=1e-3, a=1)
    sim.add(m=1e-3, a=2)
    sim.integrate(10)

    assert numpy.fabs(sim.t - 10.0) < 1e-10, "Orbit integration not working"
    return None

from pytest_pyodide import run_in_pyodide


@run_in_pyodide(
    packages=[
        "rebound",
        "numpy",
    ]
)
def test_integrate(selenium):
    import numpy
    import rebound

    sim = rebound.Simulation()
    sim.add(m=1)
    sim.add(m=1e-3, a=1)
    sim.add(m=1e-3, a=2)
    sim.integrate(10)

    assert numpy.fabs(sim.t - 10.0) < 1e-10, "Orbit integration not working"
    return None
