Improve doc

[martavp]

At AU, we have been working on improving the documentation.

We are still missing a few tasks before this PR is ready to be reviewed, but @Parisra, @Adam-Dvorak1 and @ebbekyhl will take care of them next week

TODOs LIST

[x] Add internal links from some sections to others

[x] Harmonize style in title and subtitle

[x] Review the description of the myopic approach and describe better carbon budget

[x] Finish and review Other industrial sectors

[x] Add description of energy consumption in agriculture

[ ] Create an overview of the rules like in PyPSA-Eur (maybe this can be done in a future step)

[fneum]

Great! Thanks for all your work! The references to lines in the config.yaml will be hard to maintain, but we can find a solution separately from this PR.

[martavp]

Finished the review of supply_demand.rst. Great effort, detailed descriptions, well readable. The suggestions are mainly typos. The cross-referencing to subsections seems not to work, please doublecheck. The industry section was tiring to read since it is very detailed, but that's adequate and how it should be :)

thanks for the review, @energyLS Yes, industry always super long to describe :)

[martavp]

Great! Thanks for all your work! The references to lines in the config.yaml will be hard to maintain, but we can find a solution separately from this PR.

Sure, we can find other ways to do it. I think it always clarifies to have a direct link between the documentation and where to change a particular assumption.