telescope extension: package_hsfiles does the same as package_hsgrep

### Neovim version (nvim -v) na ### Operating system/version na ### Output of :checkhealth haskell-tools ```console na ``` ### How to reproduce the issue `:Telescope ht package_hsfiles` searches through file contents instead of a haskell file list. See the implementation, it's identical to `package_hsgrep`: https://github.com/mrcjkb/haskell-tools.nvim/blob/master/lua/telescope/_extensions/ht/extension.lua#L32 ### Expected behaviour Telescope searches through haskell files list ### Actual behaviour Telescope searches through haskell files contents ### Log files ```console ``` ### The minimal config used to reproduce this issue. ```Lua na ```