## About The Pull Request
I hate looking at spiderlings. Mostly because they're an extremely fast
mob with no directional sprites or animations, so they appear to be a
rapid floating overlay.
I made some new ones. I don't know if they're objectively better but _I_
like them more.
Before:

After:

Unlike the old sprites they also have directional states and movement
animations so you can scurry around really fast without being a static
image (maybe they shouldn't be so fast? A question for another PR).
I spent like 30 minutes looking at GAGs and then realised not only would
the colours be a pain in the ass but it doesn't support movement states
anyway.
Additionally I made the "dead spiderling" item inherit the dead
spiderling icon state from that spiderling instead of always being the
generic one.
Oh also I think a typo made baby tarantulas completely invisible.
## Why It's Good For The Game
I hate looking at spiderlings.
## Changelog
🆑
image: New directional sprites for spiderlings, with movement
animations.
fix: Dead spiderlings will be the same colour as they were when they
were alive.
fix: Tarantula spiderlings are no longer invisible,
/🆑