Add topic power

[SylviaMaria123]

Description

Added two new topics for power asked for by ohmygrid.

• power lines
• power substations

Added ohmygrid to projects.yaml

Added attributes for power lines and power substations in attributes.yaml

Corresponding issue

Closes #

New or changed dependencies

Checklist

• I have ensured my branch is mergeable with main (e.g. through git rebase main if necessary)
• My code follows the style guide and was checked with pre-commit before committing
• I have commented my code
• I have added sufficient unit and integration tests
• I have added new Hurl regression tests and checked all existing tests
• I have updated the CHANGELOG.md

Please check all finished tasks. If some tasks do not apply to your PR, please cross their text out (by using ~...~) and remove their checkboxes.

[Hagellach37]

hey,
hier könnten wir auch noch core und bkg als projects hinzufügen.

[matthiasschaub]

Looks good. I left a few suggestions and one thing I noticed that some descriptions have a dot at the end and other not. Probably we always want a dot right?

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud