[DOC] Added example to plot_series & fixed example for plot_lags

[shagn]

This PR adds an example for the plot_series function and adds a missing import statement for the example of plot_lags.

For all contributions

• I've added myself to the list of contributors.
• The PR title starts with either [ENH], [MNT], [DOC], or [BUG] indicating whether the PR topic is related to enhancement, maintenance, documentation, or bug.

[fkiraly]

thanks!

[fkiraly]

looks ok, but still a draft.

We could merge it like that. Or, suggestions:

• add yourself to the contributors file, all-contsributorsrc
• add a line of explanation in the all_estimators example, what does it do?

[shagn]

Sure, I will do that

[shagn]

I just realised I made a mistake. I did merge the main branch of sktime directly and now the meanwhile introduced changes are also shown. I am not sure how to untangle that the best way... I will have a look tomorrow.

[fkiraly]

??

merging regularly from main to keep your PR branch updated is what you are expected to do in best practice GitHub flow, so all is good!

[fkiraly]

Looks good, thanks a lot!

[shagn]

Yes, I know. But I thought I should have done it differently, but it is fine. Sorry for the confusion @fkiraly.

[fkiraly]

no probs, all great, and thanks for your contribution!