A little support for the Zed editor

[tsoj]

Mostly syntax highlighting.
zed-cpp2

It is based on the tree-sitter-cpp2 I wrote.
Can be installed from the Zed extensions page (search for "cpp2").

There are probably still a few quirks (I haven't written much code using this extension yet ...), but it should mostly work fine, also seamlessly together with old C++ code.

[tsoj]

@hsutter Could it make sense to add a note about this to the other syntax highlighters: https://github.com/hsutter/cppfront/wiki#related-projects