[Fix] Created dataset module and other module changes.

[ayushanand18]

Overview of changes

• I have changed the pyobis/nodes, occurrences, checklist, and taxa modules to integrate them with OBIS v3 API and updated README with new example usage for the modules.
• I have also created a new dataset module to connect to the obis/dataset endpoint.
• I have also deleted pyobis/groups and pyobis/resources because they have become obsolete.
  (Refer: [Fix] Integrated existing pyobis modules with OBIS v3 API #8 (comment) )

Notes for reviewers

You can run tests on your local machine whether the above 5 modules are working as expected.

Questions for reviewers

No questions for reviewers.

[ayushanand18]

@pieterprovoost @ocefpaf I'm sorry for pinging you here, but just wanted to request feedback on this PR.

I know you'd have been very busy since a couple of weeks due to the GSoC timeline. May I ask for the code review, I have removed the resources module plus also included a new module for dataset endpoint. I have also updated the README with the new syntax and nomenclature.

Additionally, all tests in this branch have failed but I have worked on them and we will need one more patch to fix them (you can see the workflow run on my fork, https://github.com/ayushanand18/pyobis/actions/runs/2184556665 Status: ).

Your feedback will help me improve this PR. Thanks in advance! :)

[ocefpaf]

@ayushanand18 most of the GSoC mentors are in the IOOS Code Sprint this week and we are quite busy.
Also, I already touched base with you on this but if you can send smaller PRs with a single context it would help us a lot to review and merge. This PR removed a lot of files, changed config stuff, and added tests. Those should all be in separated PRs.

[ayushanand18]

Thanks a ton @ocefpaf for the review. I am sorry for adding so many changes to a single PR.
I'll focus on smaller and more easy to review PRs in future. Thanks again for your review and once again very sorry to disturb amidst a tight schedule.

Thank you so much @pieterprovoost :)

[ocefpaf]

I am sorry for adding so many changes to a single PR.

Don't be. There is nothing wrong with what you did. This is about how communities/people work and that usually takes time and iteration to find the best spot. Just be patient with us and we'll fine tune the PRs to take the most of your contributions.

[ayushanand18]

Thank you so much @ocefpaf :) I have learned so much from the Open Source community and especially during my time spent understanding the pyobis project. I have so much to learn more about, and I am excited about the future!