[decomp] better handling of animation code and art files (#1352)

* update refs

* [decompiler] read and process art groups

* finish decompiler art group selection & detect in `ja-group?`

* make art stuff work on offline tests!

* [decompiler] detect `ja-group!` (primitive)

* corrections.

* more

* use new feature on skel groups!

* find `loop!` as well

* fully fledged `ja` macro & decomp + `loop` detect

* fancy fixed point printing!

* update source

* `:num! max` (i knew i should've done this)

* Update jak1_ntsc_black_label.jsonc

* hi imports

* make compiling the game work

* fix `defskelgroup`

* clang

* update refs

* fix chan

* fix seek and finalboss

* fix tests

* delete unused function

* track let rewrite stats

* reorder `rewrite_let`

* Update .gitattributes

* fix bug with `:num! max`

* Update robotboss-part.gc

* Update goal-lib.gc

* document `ja`

* get rid of pc fixes thing

* use std::abs

test/decompiler/test_FormExpressionBuild.cpp

@@ -2809,7 +2809,7 @@ TEST_F(FormRegressionTest, LoopingCode) {
   std::string type = "(function symbol)";
   std::string expected =
       "(begin\n"
-      "  (while #t\n"
+      "  (loop\n"
       "   (suspend)\n"
       "   )\n"
       "  (the-as symbol #f)\n"