Basic blob mobs (#78520)

## About The Pull Request

I remembered today that blob code is ass, especially blob spores.
There's still a lot to improve but I cleaned up _some_ of it by
converting these mobs.
Now they use a newer framework and more signal handling as compared to
circular references.

I _expect_ the behaviour here to largely be the same as it was or
similar. I haven't added anything fancy or new.

This is a reasonably big PR but at least all of the files are small?
Everything here touched every other thing enough that it didnt make
sense to split up sorry.

Other things I did in code:
- Experimented with replacing the `mob/blob` subtype with a component.
Don't know if this is genius or stupid.
- AI subtree which just walks somewhere. We've used this behaviour a lot
but never given it its own subtree.
- Blob Spores and Zombies are two different mobs now instead of being
one mob which just changes every single one of its properties.
- Made a few living defence procs call super, because the only thing
super does was send a signal and we weren't doing that for no reason.
Also added a couple extra signals for intercepts we did not have.

## Changelog

🆑
fix: Blob spores will respond to rallies more reliably (it won't runtime
every time they try and pathfind).
fix: Blobbernaut pain animation overlays should align with the direction
the mob is facing instead of always facing South
refactor: Blob spores, zombies, and blobbernauts now all use the basic
mob framework. They should work the same, but please report any issues.
/🆑

---------

Co-authored-by: MrMelbert <51863163+MrMelbert@users.noreply.github.com>
Co-authored-by: san7890 <the@san7890.com>

code/modules/mob/living/basic/basic_defense.dm

@@ -165,6 +165,9 @@
 	return TRUE
 
 /mob/living/basic/blob_act(obj/structure/blob/attacking_blob)
+	. = ..()
+	if (!.)
+		return
 	apply_damage(20, damagetype = BRUTE)
 
 /mob/living/basic/do_attack_animation(atom/attacked_atom, visual_effect_icon, used_item, no_effect)