Rename `execute_ipython` to `execute_code`

[echarles]

The execute_ipython is not specific to python, so we should rename it into a more genreric execute_code (or equivalent).

[ChengJiale150]

@echarles Already in my latest roadmap in #127

[echarles]

Awesome, let's leave this open for visibility and close when implemented.

[echarles]

Closing as implemented in #134