[decompiler] as-type and font method support (#3855)

Add support for `as-type` macro, and detecting inline font methods. This
works in all three games but I've only updated jak 3's goal_src for now.
Eventually I will go back and work through the others, but I want to get
more decompiler features in first.


![image](https://github.com/user-attachments/assets/5c31bf85-97b4-437c-bc4b-dc054e60551e)

---------

Co-authored-by: water111 <awaterford1111445@gmail.com>

test/decompiler/reference/jak3/engine/collide/collide-shape_REF.gc

@@ -802,12 +802,7 @@
          (set! (-> this surf) *gravel-surface*)
          )
         (((pat-event rail))
-         (let* ((s4-0 (-> this process))
-                (a0-15 (if (type? s4-0 process-focusable)
-                           s4-0
-                           )
-                       )
-                )
+         (let ((a0-15 (as-type (-> this process) process-focusable)))
            (if (and a0-15 (not (logtest? (focus-status rail) (-> (the-as process-focusable a0-15) focus-status))))
                (set! (-> this surf) *rail-surface*)
                )