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/jak2/pc/progress/progress-pc.gc

@@ -81,7 +81,7 @@
   )
 
 
-(defmethod init-defaults progress ((obj progress))
+(defmethod init-defaults ((obj progress))
   "Initialize default menu settings."
   (set! (-> *progress-state* aspect-ratio-choice) (get-aspect-ratio))
   (set! (-> *progress-state* video-mode-choice) (get-video-mode))
@@ -187,7 +187,7 @@
       ((19) (pc-fetch-external-speedrun-times "anyorbs"))
       ((20) (pc-fetch-external-speedrun-times "anyhero")))))
 
-(defmethod set-menu-options progress ((obj progress) (arg0 symbol))
+(defmethod set-menu-options ((obj progress) (arg0 symbol))
   "Set the menu options for the menu state specified by arg0."
   (set! (-> obj current-options) #f)
   (case arg0
@@ -419,7 +419,7 @@
 
 
 
-(defmethod respond-progress menu-aspect-ratio-pc-option ((obj menu-aspect-ratio-pc-option) (arg0 progress) (arg1 symbol))
+(defmethod respond-progress ((obj menu-aspect-ratio-pc-option) (arg0 progress) (arg1 symbol))
   "Handle progress menu navigation logic."
 
   (when arg1
@@ -470,7 +470,7 @@
   )
 
 
-(defmethod respond-progress menu-display-mode-option ((obj menu-display-mode-option) (arg0 progress) (arg1 symbol))
+(defmethod respond-progress ((obj menu-display-mode-option) (arg0 progress) (arg1 symbol))
   "Handle progress menu navigation logic."
 
   (when arg1
@@ -503,7 +503,7 @@
   )
 
 
-(defmethod respond-progress menu-aspect-ratio-custom-option ((obj menu-aspect-ratio-custom-option) (arg0 progress) (arg1 symbol))
+(defmethod respond-progress ((obj menu-aspect-ratio-custom-option) (arg0 progress) (arg1 symbol))
   "Handle progress menu navigation logic."
 
   (let ((aspect-custom-val-ptr (case (-> *progress-state-pc* aspect-ratio-ratio-index)
@@ -557,7 +557,7 @@
   0
   )
 
-(defmethod respond-progress menu-frame-rate-option ((obj menu-frame-rate-option) (arg0 progress) (arg1 symbol))
+(defmethod respond-progress ((obj menu-frame-rate-option) (arg0 progress) (arg1 symbol))
   "Handle progress menu navigation logic."
 
   (when arg1
@@ -657,7 +657,7 @@
   -1)
 
 
-(defmethod respond-progress menu-music-player-option ((obj menu-music-player-option) (arg0 progress) (arg1 symbol))
+(defmethod respond-progress ((obj menu-music-player-option) (arg0 progress) (arg1 symbol))
   "Handle progress menu navigation logic."
 
   (if (= 0.0 (-> obj max-scroll))