The nvim-treesitter highlights files that we're using for most of our supported languages make use of several custom predicates and directives. This change implements the following: - `any-contains?` - `contains?` - `gsub!` - `has-ancestor?` - `has-parent?` - `not-has-ancestor?` - `not-has-parent?` Directives used in queries files which are not (yet) implemented here: - `offset!` Predicates and directives implemented in neovim but which are not used in any of the query files we are using: - `any-lua-match?` - `any-vim-match?` - `not-vim-match?` - `vim-match?` - `trim!` Testing Done: - Ran unit tests. - Verified that syntax highlighting that used these predicates and directives worked as expected.