- The directive type does not longer includes `::`.
- The content of the directives is not longer interpreted as rst,
but it uses language injection for it.
- Fix a query to allow to capture targets without link.
- Reset the content of the math role so it can be highlighted by the
injection instead.
Problems I found:
- Capturing the same node with @language and @content will raise an
error.
```
Error detected while processing FileType Autocommands for "*":
E5108: Error executing lua /usr/share/nvim/runtime/lua/vim/treesitter/languagetree.lua:331: table index is nil
```
Harcoding the language works, Using the offset predicate doesn't work
either `(#offset! 0 0 1 0)` nor `(#offset! 0 0 0 5)`
- Generating the grammar using `tree-sitter-cli@0.17.x` breaks
nvim-treesitter, `@0.16.9` works.
