Feature request: `y_rotation` could use some sugar syntax

[AgainPsychoX]

Feature request: y_rotation could use some sugar syntax in form of some keywords to compare to, like "north", "east", "west", "south", or maybe "x+", "x-", "z-", "z+".

BTW: also reported issue for invalid highlighting at VS Code extension repo: https://github.com/minity-script/minity-vscode/issues/1

BTW2: I am doing multiple feature request, I wish there were labels I could use to prioritize stuff 👀 since some of those are just sugar syntax, not really a important issue.