Allow shell expansion/interpolation in rye run command

[dvonessen]

Hi,

I asked this question in the discord, but thought about it.
At the moment it is not possible to use shell interpolation with rye run command.
See: https://rye-up.com/guide/pyproject/#cmd

It would be awesome if that would be made possible.
pdm does seem to have this ability.
See: https://pdm-project.org/latest/usage/scripts/#shell

Example:

...
[tool.rye.scripts]
test_script = {shell="echo $TEST_ENV"}

> export TEST_ENV="FooBar"
> rye run test_script
$TEST_ENV

[aspizu]

How would this work? Should rye make its own shell language, or use Bash?