feat: showcase inconsistent potentials in offshore generators data

[tgilon]

Do not merge the PR.

Changes proposed in this Pull Request

The purpose of this PR is to share the notebook that was used to assess the inconsistencies in the Offshore hubs/GENERATOR.XLSX data. See Summary in the notebook.

This is an archive.

Checklist

• I tested my contribution locally and it works as intended.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to envs/environment.yaml.
• Changes in configuration options are added in config/config.default.yaml.
• Changes in configuration options are documented in doc/configtables/*.csv.
• Changes in configuration options are added in config/test/*.yaml.
• Sources of newly added data are documented in doc/data_sources.rst.
• A release note doc/release_notes.rst is added.