I fear the upstream queries may be broken, somehow, as they don't work
with `--apply-all-captures` which should match the "last query wins"
matching behaviour of `nvim-treesitter`.
I also removed `locals.scm`, as `tree-sitter` and `nvim-treesitter` don't
agree on how to write it, and I don't really care about it.
It does mean that the highlights can't tell the difference between `int`
the built-in and `int` the type alias anymore, but that's a small
edge-case (and `nvim-treesitter` didn't support it anyway).
Unfortunately it seems like this is not really testable with the
'tree-sitter' tooling.
If I want to check that this is working correctly, I should explore how
to make use of, e.g., neovim to automate testing.
