[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/ui/bigmap_REF.gc

@@ -339,12 +339,7 @@
     (init-vf0-vector)
     (cond
       ((= (-> arg1 position) #t)
-       (let* ((s3-0 (handle->process (-> arg1 handle)))
-              (v1-4 (if (type? s3-0 process-drawable)
-                        (the-as process-drawable s3-0)
-                        )
-                    )
-              )
+       (let ((v1-4 (as-type (handle->process (-> arg1 handle)) process-drawable)))
          (if (and v1-4 (nonzero? (-> v1-4 root)))
              (set! (-> arg1 last-world-pos quad) (-> v1-4 root trans quad))
              )
@@ -354,13 +349,12 @@
             (= (-> (the-as basic (-> arg1 position)) type) entity-actor)
             )
        (let* ((v1-14 (the-as entity-actor (-> arg1 position)))
-              (s3-1 (if v1-14
-                        (-> v1-14 extra process)
-                        )
-                    )
-              (a0-13 (if (type? s3-1 process-drawable)
-                         (the-as process-drawable s3-1)
-                         )
+              (a0-13 (as-type
+                       (if v1-14
+                           (-> v1-14 extra process)
+                           )
+                       process-drawable
+                       )
                      )
               )
          (if a0-13