Add plots

[SabineHaas]

Adds working dispatch plots. Scalar plots are not working, yet.
Not sure, yet, whether this will be merged in the future.

Note: To make the scalar plots work you need to adapt oemoflex in the following lines:

https://github.com/rl-institut/oemoflex/blob/77bfaeb4dd0d6cfab65420a3aba7e5091e4ca14f/oemoflex/tools/plots.py#L150-L151

       if len(mapped) > 1:
           mapped=mapped[-1]
           warnings.warn(f"Multiple labels are matching for {string}: {mapped}. the last one was chosen")

Before merging into dev-branch, please make sure that the following points are checked:

• All pre-commit tests passed locally with: pre-commit run -a
• File CHANGELOG.md was updated
• The docs were updated
  • if dataset.mds were updated, the dataset docs were regenerated using
    python docs/generate_dataset_mds.py

If packages were modified:

• File poetry.lock was updated with: poetry lock
• A new env was successfully set up

WARNING: When modifying use snakemake <=7.32.0, cf. #186

If data flow was adjusted:

• Data pipeline run finished successfully with: snakemake -jX

• Esys appdata was created successfully with: snakemake -jX make_esys_appdata

  (with X = desired number of cores, e.g. 1)