Additional variables from GENeSYS-MOD for openTEPES and Plan4EU

[tburandt]

Additional/changed variables after requests from @erikfilias and @sandrinecharousset

[danielhuppmann]

Thanks @tburandt - see a few comments inline

[danielhuppmann]

Thanks @tburandt for these changes - I tried to resolve the merge conflicts to save you some time, please review and write a comment when it's good to merge.

One observation: @erikfilias changed the units from GW (only) to allow both MW and GW - maybe also relevant in this PR for consistency?

[danielhuppmann]

@tburandt @loeffko, this PR has not been active for a year - please review whether the proposed changes are still relevant.

If yes, please resolve the merge conflicts or start a new branch and PR with the relevant changes. Then, close this PR.

[sandrinecharousset]

@tburandt @loeffko, this PR has not been active for a year - please review whether the proposed changes are still relevant.

If yes, please resolve the merge conflicts or start a new branch and PR with the relevant changes. Then, close this PR.

@danielhuppmann @loeffko @tburandt it appears that except maybe for the emissions.yaml file, all other changes are already included in the master or in more recent PRs. I would suggest you review the changes in emissions.yaml and create a new PR if necessary, and close this one.....