better docs

[zimbatm]

…beginning of new section in install.md

[zimbatm]

nice, it's on the right track

[phaer]

Thanks! I see this is still a draft, but nevertheless left some comments. Hope they are useful, feel free to ignore if not - might be a bit on the pedantic side 😅

nit: Line lengths seem to be quite inconsistent here. My personal preference would be to use explicit newlines for paragraphs only. Or use one line per sentence for improved diffs. Anything else is also fine, as long as it's consistent.

[jeffcogswell]

I think this is ready for review. I do want to make some more small changes, but as per Jonas's suggestion, I should be making these PRs smaller and more specific. If you all can review this, then we can merge it in, and I can then start making smaller changes. Thanks! 😃

[zimbatm]

nice. there is just one merge conflict to resolve and then it's good to go