`ensure_imported` does not add import if there is a `from` import from the same module

[vlopezferrando]

When you have an import of the form:

from math import log

And then you want to ensure that math is imported with:

where {
    $import = "math",
    $import <: ensure_imported(),
}

You would expect that the resulting code is:

import math
from math import log

But the code is left as is, as the pattern does not match. Here is a studio reproducing the issue

[morgante]

@vlopezferrando Up for trying to fix this? All the imports code is defined here: https://github.com/getgrit/python/blob/main/.grit/patterns/importing.md