Make "tag" a system property like "tags", the same as how "alias" and "aliases" function the same

It bothers me greatly that when I want to create a page-tag, I have to use “tags” even when I only have one tag to add. “Alias” & “aliases” are a great example how logseq takes plurality into consideration, please make “tag” function the same as “tags”, too!

about “alias” and “aliases” functioning the same — I don’t know where I got that idea from (maybe I saw something like a pull request and I misunderstood the point) but I was wrong. oops.