A few questions about c++-ts-mode.

[Ergus]

Hi

There are a few differences between c++-ts-mode and c++-mode that I
don't know if should be reported or they are like that due to some
design choice.

1. namespaces are not fontified like in c-mode (i.e in std::string the
  `std` used to have font-lock-constant-face while `string` used to have
  font-lock-type-face). It seems like tresitter identifies properly them
  like (namespace_identifier) and (type_identifier)

2. Doc string comments are fontified like normal comments. It looks like
  treesiter does not recognize them at all. Is this something we need to
  report to treesitter or we need to workaround it in emacs side?

3. macros like `#if defined(something)` fontifies the whole macro with
  same font (the `identifier` used to have no colors in c++-mode)


Somehow related:

Now that there is treesitter, eglot, project.el, improved xref and
completions + flymake... does anyone still use CEDET? If not... is there
some plan to remove it in the future? There is few documentation around
mentioning it and created confusion in new users...

Thanks in advance,
Ergus