support evcxr kernel in jupyter notebook

[wangjiawen2013]

Display the plot in jupyter notebook thanks to the evcxr kernel.

[wangjiawen2013]

@cpmech
Hi,
I have pulled the request, but it seems that something happened when uploading the code, you can see the details here (https://github.com/cpmech/plotpy/actions/runs/10430518815/job/28926195783?pr=59):

[2024-08-19T04:55:34.790Z] ['info'] Processing /home/runner/work/plotpy/plotpy/lcov.info...
[2024-08-19T04:55:34.797Z] ['info'] Detected GitHub Actions as the CI provider.
[2024-08-19T04:55:34.978Z] ['info'] Pinging Codecov: https://codecov.io/upload/v4?package=github-action-3.1.6-uploader-0.8.0&token=*******&branch=main&build=10430518815&build_url=https%3A%2F%2Fgithub.com%2Fcpmech%2Fplotpy%2Factions%2Fruns%2F10430518815%2Fjob%2F[28](https://github.com/cpmech/plotpy/actions/runs/10430518815/job/28918820183?pr=59#step:7:29)926195783&commit=25e6adc92cf709de4e428188239784c5903806ca&job=Test+%26+Coverage&pr=59&service=github-actions&slug=cpmech%2Fplotpy&name=&tag=&flags=&parent=
[2024-08-19T04:55:35.316Z] ['error'] There was an error running the uploader: Error uploading to https://codecov.io: Error: There was an error fetching the storage URL during POST: 4[29](https://github.com/cpmech/plotpy/actions/runs/10430518815/job/28918820183?pr=59#step:7:30) - {'detail': ErrorDetail(string='Rate limit reached. Please upload with the Codecov repository upload token to resolve issue. Expected time to availability: 469s.', code='throttled')}
Error: Codecov: Failed to properly upload: The process '/home/runner/work/_actions/codecov/codecov-action/v3/dist/codecov' failed with exit code 255

Here s a related issue (codecov/codecov-action#598), maybe some configurations should be made for this github repository (such as CODECOV_VERSION or secret token). Could you check that and merge the request ?

[cpmech]

Hi, thank you for the PR!

It seems that codecov is not working at the moment. I'm trying since this morning but still it won't work.

I'll wait a little longer and will keep trying.

Meanwhile, could you please rename the function show to show_in_evcxr

[wangjiawen2013]

Renamed.