Improve C++ Tree-sitter queries

[VacheDesNeiges]

I made a few tree-sitter queries for improving the highlighting of C++.

There is one query that I'm not totally certain about and would appreciate some feedback on it, the one that concerns attributes.

Many editor only highlight the identifier as a keyword (This is the behavior implemented in this commit), while others, for example the tree-sitter plugin for neovim, tags the entire attribute for highlighting (double brackets included). I don't know which one is preferable. Here are screenshots of the two versions:

Release Notes:

• Fixed C++ attributes identifiers being wrongly highlighed through the tag "variable"
• C++ attribute identifiers (nodiscard,deprecated, noreturn, etc.. ) are now highlighted through the tag "keyword"
• Changed C++ primitives types (void, bool, int, size_t, etc.. ) to no longer be highlighted with the tag "keyword", they can now be highlighted by the tag "type.primitive".
• Added a tag "concept" for highlighting C++ concept identifiers. (This tag name has been chosen to be the same than the one returned by clangd's semantic tokens)