[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/jak2/engine/target/target-handler_REF.gc

@@ -254,11 +254,7 @@
     (sv-704 matrix)
     )
   (set! sv-224 arg5)
-  (let* ((s3-0 arg0)
-         (s4-0 (if (type? s3-0 process-focusable)
-                   s3-0
-                   )
-               )
+  (let* ((s4-0 (the-as process (as-type arg0 process-focusable)))
          (s3-1 (and s4-0 (focus-test? (the-as process-focusable s4-0) dead hit)))
          )
     (set! sv-96