fix(entry_maker): use the un-transformed filename to determine title's devicon

[tsakirist]

To determine the devicon for a filename, we should avoid passing in the transformed display name, as the result can vary depending on the path_display telescope setting, potentially leading to undesired outcomes.

For instance, with the following telescope path_display setting, the result can be seen in the attached image.

    require("telescope").setup {
        defaults = {
             path_display = { "filename_first" },
        }
    }