[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/reference/engine/ui/hud-classes_REF.gc

@@ -1013,14 +1013,11 @@
   )
 
 ;; failed to figure out what this is:
-(defskelgroup *fuelcell-naked-sg* fuelcell-naked
-  0
-  2
-  ((1 (meters 999999)))
-  :bounds (static-spherem 0 1 0 1.6)
-  :longest-edge (meters 0)
-  :texture-level 2
-  )
+(defskelgroup *fuelcell-naked-sg* fuelcell-naked fuelcell-naked-lod0-jg fuelcell-naked-idle-ja
+              ((fuelcell-naked-lod0-mg (meters 999999)))
+              :bounds (static-spherem 0 1 0 1.6)
+              :texture-level 2
+              )
 
 ;; failed to figure out what this is:
 (defpart 313

test/decompiler/reference/engine/ui/hud_REF.gc

@@ -284,7 +284,7 @@
   :code
   (behavior ()
     (logior! (-> self mask) (process-mask sleep-code))
-    (while #t
+    (loop
       (suspend)
       )
     (none)
@@ -362,7 +362,7 @@
     )
   :code
   (behavior ()
-    (while #t
+    (loop
       (if (not (paused?))
           (seekl! (-> self offset) 0 (the int (* 15.0 (-> *display* time-adjust-ratio))))
           )
@@ -426,7 +426,7 @@
   (-> hud-arriving event)
   :code
   (behavior ((arg0 int))
-    (while #t
+    (loop
       (if (not (paused?))
           (seekl! (-> self offset) 128 (the int (* (the float arg0) (-> *display* time-adjust-ratio))))
           )
@@ -512,7 +512,7 @@
             (f24-0 (-> self root-override scale y))
             (f22-0 (-> self root-override scale z))
             )
-        (while #t
+        (loop
           (let ((f0-7 (* f30-0 (-> *display* seconds-per-frame))))
             (+! f26-0 f0-7)
             (when (< 1.0 f26-0)

test/decompiler/reference/engine/ui/progress/progress_REF.gc

@@ -1116,7 +1116,7 @@
     )
   :code
   (behavior ()
-    (while #t
+    (loop
       (when (hud-hidden?)
         (dotimes (gp-0 (-> self nb-of-particles))
           (if (= (-> self particles gp-0 part matrix) -1)
@@ -2122,7 +2122,7 @@
     )
   :code
   (behavior ()
-    (while #t
+    (loop
       (when (and (cpad-hold? 0 l1) (cpad-hold? 0 r1) *cheat-mode*)
         (when (and (< (-> self task-index) (-> *level-task-data* (-> self display-level-index) nb-of-tasks))
                    (>= (-> self task-index) 0)
@@ -2452,7 +2452,7 @@
     )
   :code
   (behavior ()
-    (while #t
+    (loop
       (seekl! (-> self in-out-position) 0 (the int (* 170.0 (-> *display* time-adjust-ratio))))
       (when (< (-> self in-out-position) 2867)
         (seekl!
@@ -2490,7 +2490,7 @@
     )
   :code
   (behavior ()
-    (while #t
+    (loop
       (seekl!
         (-> self transition-offset)
         512
@@ -2523,7 +2523,7 @@
     )
   :code
   (behavior ()
-    (while #t
+    (loop
       (cond
         ((cpad-pressed? 0 left)
          (if (> (-> self current-debug-string) 0)