bug#73404: 30.0.50; [forward/kill/etc]-sexp commands do not behave as expected in tree-sitter modes

[Juri Linkov]

> The new logic is the following: if there is no sexp thing defined at point,
> then fall back to 'forward-sexp-default-function'.
>
> Then after (setq js--treesit-sexp-nodes '("binary_expression"))
> 'C-M-f' in e.g.
>
>   export const add = (a, b) => -!-a + b;
>
> moves point to
>
>   export const add = (a, b) => a + b-!-;

Unfortunately, I still can't find a way to handle such case
that from

    export const add = (a, b) -!- => a + b;

typing 'C-M-f' should jump to the end of the next sexp
(to the end of whole "binary_expression"):

    export const add = (a, b) => a + b-!-;

since only tree-sitter knows about "binary_expression",
so 'forward-sexp-default-function' can't be used here.