[Idea] Highlight sync modes

[DaWe35]

Hi, I'm just interested in hearing your opinion. I think for new users it's a bit complicated to find all the monerod flags related to sync mode. I made a small gist explaining how to run a full-node, fast sync, or prune: https://gist.github.com/DaWe35/aaa0d1a99be4a6fb0977fb7df7ddb702

I think it would be nice to have something like this in the docs, but idk, if it makes sense to you to add more redundancy just because it is easier for new users.

[SamsungGalaxyPlayer]

Agreed