Create solution settings - sets the settings file per solution.
Reason: Many of the options affect the generation of code. Those options should be able to be shared alongside the solution file so all members of a team automatically use the same settings. Also, if the settings are stored alongside the solution, they can be checked into version control.
Create color palette - WE reads and generates UI that shows your site's color pallete, from there you could just pick the colors instead of having to try to remember what the color codes are.
Create markdown stylesheet - I think this one is used for code samples, allows to specify a custom CSS file for the Markdown preview pane