[Idea] Right Side and Centering Alignment

This has been a 'that'd be nice' idea for me for awhile and I'm surprised no one has mentioned it before. Especially with the new embed pic size, would it be easy/possible to add in a right-side alignment and centering option in posts? I cannot tell you how much I would use this as an individual and how useful it can be in the future for readability/picture wrangling. I don't know how complicated this would be, but I can tell you I would at least be eternally grateful.