Consider shipping routes for offshore potential calculation

[p-glaum]

Partly tackles #34

Changes proposed in this Pull Request

In this pull request, we use the global shipping density dataset (https://datacatalog.worldbank.org/search/dataset/0037580/Global-Shipping-Traffic-Density) to exclude offshore areas in the offshore wind potential calculation.

ToDos

• Add global shipping density dataset file to data bundles
• Add a direct path to the already processed shipping density raster

Checklist

• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Newly introduced dependencies are added to envs/environment.yaml and envs/environment.docs.yaml.
• Changes in configuration options are added in all of config.default.yaml, config.tutorial.yaml, and test/config.test1.yaml.
• Changes in configuration options are also documented in doc/configtables/*.csv and line references are adjusted in doc/configuration.rst and doc/tutorial.rst.
• A note for the release notes doc/release_notes.rst is amended in the format of previous release notes.

[p-glaum]

Here is an example, how the shipping routes exclusion (no further exclusions) would look like:

[fneum]

Looks very good! Code and example graphic.

Some smaller comments:

[fneum]

Great!

Last steps:

• @p-glaum add release note
• @fneum will update data bundle

[fneum]

Fantastic, I included the necessary dataset on zenodo and all ran smoothly locally. This can go in. Many thanks @p-glaum