Jak2 decomp/hover formation (#2028)

This is a WIP while I'm learning the ins and outs of decompilation, but
putting up what I have for 2 reasons:

- Hoping someone can double check I'm on the right path (all functions
have signatures, all reasonably safe guesses for types have been put in,
using "object" for type where they're not)
- Might be blocked by not being able to run the offline-tests as a PAL
scrub

I'm going to look at what might be involved in making tests work for
PAL, but wouldn't be surprised if I have to wait to get a black label
version and come back to this after :(

---------

Co-authored-by: Tyler Wilding <xtvaser@gmail.com>

decompiler/config/jak2/stack_structures.jsonc

@@ -1913,5 +1913,9 @@
     [32, "vector"],
     [80, "vector"]
   ],
-  "(method 181 bombbot)": [[16, ["array", "collide-shape", 64]]]
+  "(method 181 bombbot)": [[16, ["array", "collide-shape", 64]]],
+  "test-gen-perms": [[16, "gen-perms-context"]],
+  "gen-perms": [[16, "gen-perms-context"]],
+  "(method 11 hover-formation-control)": [[16, ["inline-array", "vector", 16]]],
+  "(method 11 hover-formation)": [[16, "vector"]]
 }