Define methanol energy demand for industry

[tgi-climact]

Changes proposed in this Pull Request

The industrial energy demand of methanol was methane and electricity. I suggest to use the low carbon route (already used for shipping methanol) defined by DECHEMA. This route uses hydrogenation of $CO_2$ to produce methanol, which requires hydrogen, carbon dioxide and electricity.

Checklist

• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to envs/environment.yaml.
• Changes in configuration options are added in all of config.default.yaml.
• Changes in configuration options are also documented in doc/configtables/*.csv.
• A release note doc/release_notes.rst is added.

[fneum]

Neat suggestion and nicely prepared! With intermediate industry sector ratios, there is now an exogenous transition from methane-based methanol production to the low-carbon route. An extension of this would be to directly add links for the methane route to the model and endogenize this.

[tgi-climact]

@fneum Very little detail here. I realise it would be better to have #467b8c (or something else) as the colour for industry methanol (https://github.com/PyPSA/pypsa-eur/blob/master/config/config.default.yaml#L1156) rather than the same colour as shipping (#468c8b). Do you want a PR for this ?