Implement `picks` argument to `Raw.plot()`

[ivopascal]

Implements #12355

An arguments picks is added to Raw.plot() to offer it the same functionality as Epochs.plot() and Evoked.plot().

Picks selects a subset of channels to be visualised, but ignores the order of them. order= does specify the sequence. Any interactions are resolved in the same way as Epochs.plot().

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[ivopascal]

No matching distribution found for numpy>=2.0.0.dev0

I think https://anaconda.org/scientific-python-nightly-wheels/ is experiencing some hick-ups, as nothing from numpy is showing there. The pipelines of other PRs were able to pull from there just fine 12 hours ago.

[ivopascal]

Ah, it's a known problem https://github.com/numpy/numpy/issues/25907

[matthewfeickert]

@ivopascal Please retrigger the CI given https://github.com/numpy/numpy/issues/25907#issuecomment-1973431825.

[larsoner]

We will once https://github.com/numpy/numpy/issues/25907#issuecomment-1973484113 is fixed :)

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