DM-38703: Add missing bright star feature to subtractBrightStars

[leeskelvin]

No description provided.

[taranu]

Broadly speaking, the logic in these changes appears fine in terms of how the functions are split up, named and called (I'm assuming they've been tested elsewhere). However, I think they would benefit greatly from a few judiciously-placed comments to explain the logic and flow. I have a half-remembered idea of how this task was supposed to work from the last time Morgan talked about it but it's not quite enough for me to piece together exactly what's happening at each stage.

[taranu]

Some further suggestions/comments.

@bazkiaei for your next review, please have a look at https://developer.lsst.io/work/flow.html#using-github-pull-requests and especially note the recommendation to use emoji reactions for minor fixes that do not require discussion.

[taranu]

A few more nitpicks.