docs: add support for :override-doc in method declarations as well as documenting state handlers (#2139)

Adding support for better child-type method docstrings. This is a
problem unique to methods.

Usually, a child-type will have the same signature and a common name
will apply, but the implementation is different. This means, you
probably want a different docstring to describe what is happening.

Currently this is possible to do via `:replace`. The problem with
replace is two fold:
- a replaced method ends up in the generated `deftype`...because you
usually change the signature!
- we don't put docstrings in the `deftype` in normal GOAL, this is just
something we do for the `all-types` file (they go in the `defmethod`
instead)
- more importantly, this means anytime you now want to change the
parent's name/args/return type -- you have to apply that change
everywhere.

So this is a better design you can now just declare the method like so:
```clj
(:override-doc "my new docstring" <method_id>)
```

And internally a pseudo-replaced method will be added, but it will
inherit everything from the parent (except the docstring of course)

Unrelated - I also made all the keyword args for declaring methods not
depend on ordering

This also adds support for documenting virtual and non-virtual state
handlers. For example:

```clj
  (:states
    (part-tester-idle (:event "test") symbol))
```

or

```clj
(idle () _type_ :state (:event "test") 20)
```

I will probably add the ability to give some sort of over-view docstring
at a later date.

Co-authored-by: water <awaterford111445@gmail.com>

test/decompiler/reference/jak2/engine/debug/part-tester_REF.gc

@@ -23,6 +23,9 @@
   :method-count-assert 14
   :size-assert         #x8c
   :flag-assert         #xe0010008c
+  (:states
+    part-tester-idle
+    )
   )
 
 ;; definition for method 3 of type part-tester

test/decompiler/reference/jak2/engine/debug/viewer_REF.gc

@@ -16,6 +16,9 @@
   :method-count-assert 20
   :size-assert         #xcc
   :flag-assert         #x14005000cc
+  (:states
+    viewer-process
+    )
   )
 
 ;; definition for method 3 of type viewer