deftype and defmethod syntax major changes (#3094)

Major change to how `deftype` shows up in our code:
- the decompiler will no longer emit the `offset-assert`,
`method-count-assert`, `size-assert` and `flag-assert` parameters. There
are extremely few cases where having this in the decompiled code is
helpful, as the types there come from `all-types` which already has
those parameters. This also doesn't break type consistency because:
  - the asserts aren't compared.
- the first step of the test uses `all-types`, which has the asserts,
which will throw an error if they're bad.
- the decompiler won't emit the `heap-base` parameter unless necessary
now.
- the decompiler will try its hardest to turn a fixed-offset field into
an `overlay-at` field. It falls back to the old offset if all else
fails.
- `overlay-at` now supports field "dereferencing" to specify the offset
that's within a field that's a structure, e.g.:
```lisp
(deftype foobar (structure)
  ((vec    vector  :inline)
   (flags  int32   :overlay-at (-> vec w))
   )
  )
```
in this structure, the offset of `flags` will be 12 because that is the
final offset of `vec`'s `w` field within this structure.
- **removed ID from all method declarations.** IDs are only ever
automatically assigned now. Fixes #3068.
- added an `:overlay` parameter to method declarations, in order to
declare a new method that goes on top of a previously-defined method.
Syntax is `:overlay <method-name>`. Please do not ever use this.
- added `state-methods` list parameter. This lets you quickly specify a
list of states to be put in the method table. Same syntax as the
`states` list parameter. The decompiler will try to put as many states
in this as it can without messing with the method ID order.

Also changes `defmethod` to make the first type definition (before the
arguments) optional. The type can now be inferred from the first
argument. Fixes #3093.

---------

Co-authored-by: Hat Kid <6624576+Hat-Kid@users.noreply.github.com>

goal_src/jak1/engine/debug/memory-usage.gc

@@ -11,7 +11,7 @@
 (declare-file (debug))
 
 
-(defmethod inspect memory-usage-block ((this memory-usage-block))
+(defmethod inspect ((this memory-usage-block))
   "Print the memory-usage by category. This is a large print."
   (format #t "-------------------------------------------------------------~%")
   (format #t " #                 name    count    bytes used   aligned bytes~%")
@@ -38,7 +38,7 @@
   this
   )
 
-(defmethod mem-usage object ((this object) (arg0 memory-usage-block) (arg1 int))
+(defmethod mem-usage ((this object) (arg0 memory-usage-block) (arg1 int))
   "Most general mem-usage message. Just prints a warning, in case you expect this to do something."
   (if this
       (format #t "WARNING: mem-usage called on object, probably not what was wanted for ~A~%" this)
@@ -46,7 +46,7 @@
   this
   )
 
-(defmethod calculate-total memory-usage-block ((this memory-usage-block))
+(defmethod calculate-total ((this memory-usage-block))
   "Compute the total memory usage of everything in the block."
   (let ((v0-0 0))
     (dotimes (v1-0 (-> this length))
@@ -56,7 +56,7 @@
     )
   )
 
-(defmethod reset! memory-usage-block ((this memory-usage-block))
+(defmethod reset! ((this memory-usage-block))
   "Reset all memory stats to 0."
   (set! (-> this length) 0)
   (dotimes (v1-0 109)
@@ -78,8 +78,8 @@
     )
   )
 
-(defmethod compute-memory-usage level ((this level) (arg0 object))
-  "Compute the memory usage of a level. Arg0 will force a recalculation."
+(defmethod compute-memory-usage ((this level) (arg0 object))
+  "Compute the memory usage of a level. arg0 will force a recalculation."
   (if (zero? (-> this mem-usage-block))
       (set! (-> this mem-usage-block) (new 'debug 'memory-usage-block))
       )
@@ -91,7 +91,7 @@
   (-> this mem-usage-block)
   )
 
-(defmethod mem-usage process-tree ((this process-tree) (arg0 memory-usage-block) (arg1 int))
+(defmethod mem-usage ((this process-tree) (arg0 memory-usage-block) (arg1 int))
   "Compute the memory usage of a process tree."
   (let ((v1-0 87))
     (let* ((a0-1 *dead-pool-list*)
@@ -306,8 +306,7 @@
 ;; the max dma ever (excluding debug)
 (define *max-dma* 0)
 
-
-(defmethod print-mem-usage memory-usage-block ((this memory-usage-block) (arg0 level) (arg1 object))
+(defmethod print-mem-usage ((this memory-usage-block) (arg0 level) (arg1 object))
   "Print memory usage. Uses a foramt that will fit on screen."
   
   ;; print header (same in normal and compact mode)