split bioenergy into biogas and solid biomass

[fneum]

Closes # (if applicable).

Change proposed in this Pull Request

Splits "Bioenergy" into "Biogas" and "Solid Biomass".

On the side, updated powerplants map:

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Other

Checklist

• I have added a note to release notes doc/release_notes.rst.
• I have used pre-commit run --all to lint/format/check my contribution
• I have documented the effects of my code changes in the documentation doc/.
• I have adjusted the docstrings in the code appropriately.

[fneum]

Tests fail because of some cache not being updated. Ready to merge from my side @lkstrp.

[fneum]

Stop, the biomass is missing in the image...