Alias Project Mugen -> Ananta

BUR #58750 is pending approval.

create alias project_mugen -> ananta

Project Mugen was the code name for Ananta for a while before that name was revealed. I keep forgetting its current name and can't find it on Danbooru because there's no alias since it was manually renamed. The EN Youtube and X/Twitter still use Project Mugen too.

Hmm, there are a few ananta_* tags with qualifiers but they are also very small.

Oops I didn't notice that. If it's preferred, a _(game) qualifier could be added. But yeah this Ananta is a lot more relevant than the other Ananta tags.

There's a few rare cases where despite the ambiguity, a tag was allowed to survive without a qualifier or was even dequalified because it was pointless to qualify the one tag with hundreds or thousands of results versus the single digit post tag(s) that hadn't been used in years and it was more likely that people were going to search for the big tag. This is not a stable precedent though and it can be overridden by other precedents, such as the attempt to dequalify Makima (Chainsaw Man) or Saber (Fate) having a qualifier. For me, I'm okay with it being without qualifier against only 4 tags that, combined, have 9 results and barely get new posts.