Better Scoreboard Sidebar Display Options (Commands)

The scoreboard objectives display command should have more options, especially for the side bar. First of all, better control over who views it, using target selectors instead of team color, for color is very limiting in options and doesn't easily allow for single player viewing. Second, sidebars can currently only show one score at a time, forcing those who wish for multiple to use a roundabout, tedious, and ultimately inadequate method. Finally, it would be useful if there were more options for how to sort the sidebar. Though most would generally use the current top down highest score to lowest score, but it some cases other options, such as lowest score to highest score, or even fixed positions, may be wanted. This should be added in as soon as possible, preferably in the 1.17 Caves & Cliffs update.