[DOC] Implement dataset module and add new documentation

[felipeffm]

Discuss:

how make documentation more readable for all: Sugestion: separe advanced concepts and make it visual

how to simplify the code at examples. Sugestion: preprocess outside code

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 76.19048% with 15 lines in your changes missing coverage. Please review.

Project coverage is 93.91%. Comparing base (e1683e3) to head (10878dc). Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/prophetverse/examples/repository/repositories.py	67.74%	10 Missing :warning:
src/prophetverse/examples/repository/base.py	76.47%	4 Missing :warning:
src/prophetverse/examples/preprocess_datasets.py	91.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #101 +/- ## ========================================== - Coverage 94.85% 93.91% -0.95% ========================================== Files 26 30 +4 Lines 1186 1249 +63 ========================================== + Hits 1125 1173 +48 - Misses 61 76 +15 ```

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[felipeangelimvieira]

Related issue #102

[felipeangelimvieira]

@felipeffm as we've talked today, I think it would be nice to have a structure similar to sktime, with one function for each dataset I liked the idea of having a file with common plotting functions used in the documentation examples as you are implementing. Thank you very much for proposing this PR :)

[fkiraly]

might this also be relevant? https://github.com/sktime/sktime/pull/4333

[felipeangelimvieira]

might this also be relevant? sktime/sktime#4333

yes! Felipe told me he won't be able to finish this PR due to bandwidth limitation, I'm planning to implement it inheriting BaseObject from skbase - now potentially BaseDataset from sktime. I can imagine that this sktime's PR still need some work, and all datasets would need to be adapted, isn't it?

[fkiraly]

I can imagine that this sktime's PR still need some work, and all datasets would need to be adapted, isn't it?

Yes, that's right - it is just a design study at the moment, not even a fully developed API. It was created for the benefit of some contributors who were considering to work on this but then abandoned the project.

So, if you create an API in prophetverse and it looks good and adaptable, I would very much also like to adapt it for sktime. Or, if you even implement such an interface in sktime first, and then "inherit" it in prophetverse, that would be even nicer! Either would be appreciated, as I also do not have bandwidth for the data sets module at the moment.

[felipeangelimvieira]

Alright, I'll implement it in sktime and then use it in Prophetverse. I'm currently on vacation and should start working on that in about 2 weeks.

[felipeangelimvieira]

Closed in favour of #130