bug#60888: 29.0.60; Lost c-or-c++-ts-mode

[Juri Linkov <juri@linkov.net>]

close 60882 29.0.60
close 60888 29.0.60
thanks

>>> I started to rely on c-or-c++-ts-mode because there is no other replacement
>>> to use for such mappings in init files:
>>>    (when (and (treesit-ready-p 'c t) (treesit-ready-p 'cpp t))
>>>      (add-to-list 'major-mode-remap-alist '(c-or-c++-mode . c-or-c++-ts-mode)))
>>> c-or-c++-mode is activated for all .h files, so there should be the
>>> corresponding
>>> c-or-c++-ts-mode, but it's lost somewhere in emacs-29.
>>
>> Apparently it was decided that it's a new feature, and thus too late
>> for emacs-29.
>
> I added it back. It really is a bug preventing one to use c(++)-ts-mode
> on header files. So this should be fine to add. Plus I mostly just
> copy-pasted from cc-mode. Sorry for the back-and-forth.

Thanks, so now closing.

PS: It's nice that you added such instructions to the commentary and docstrings:

  ;; (add-to-list 'major-mode-remap-alist '(c-or-c++-mode . c-or-c++-ts-mode))

Maybe it should be sufficient for emacs-29 and better than updating
user's auto-mode-alist automatically.