Fork adjustments v1

[Emre-Yorat89]

Closes # (if applicable).

Changes proposed in this Pull Request

Hi,
I have prepared a draft for the adjustments to transition of the project to pypsa-earth. Before this PR I was working on the merged project and doing the adjustments there but that method was not allowing us to check whether CI is working. So I tried my best to make the adjustments on pypsa-distribution first, some of them has worked and some of them has given me errors in the workflow run, that is why it has taken a bit time to solve the issues and I am sorry for not making it in time. However, I believe these changes could help to relieve conflict errors between the two project mostly but we still need to try and see the results :). Thank you for all the support.

Bests.

Checklist

• I consent to the release of this PR's code under the GPLv3 license and non-code contributions under CC0-1.0 and CC-BY-4.0.
• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Newly introduced dependencies are added to the main environment at PyPSA-Earth repository
• Changes in configuration options are added in all of config.default.yaml and config.tutorial.yaml.
• Add a test config or line additions to test/ (note tests are changing the config.tutorial.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, including reference to the requested PR.