Allow to provide custom query for get_captures_at_position and get_captures_at_cursor

[stasjok]

Feature already in Vim?

No response

Feature description

get_captures_at_position and get_captures_at_cursor functions are added in #20093. It looks like they can return only captures from highlighter. It would be useful to allow specifying custom query for cases where simple get_node_at_cursor is not enough. In this case I write a custom query for e.g. conditions what snippets can be expanded here, conditions for auto-pairs etc.

[clason]

Yes, (only) that is their intended use case, as this is the only treesitter functionality provided by Neovim itself at the moment.

More complicated use cases are probably still better served by https://github.com/nvim-treesitter/playground.