[neovim] Show paths in Telescope filename-first

See: nvim-telescope/telescope.nvim#2014 (comment)

neovim/.config/nvim/lua/plugins/navigation.lua

@@ -82,8 +82,33 @@ return {
     },
     lazy = false,
     config = function()
+      -- Display entry text after two tabs as comment.
+      -- Used to display file paths as filename followed by greyed-out path.
+      -- https://github.com/nvim-telescope/telescope.nvim/issues/2014#issuecomment-1873229658
+      vim.api.nvim_create_autocmd("FileType", {
+        pattern = "TelescopeResults",
+        callback = function(ctx)
+          vim.api.nvim_buf_call(ctx.buf, function()
+            vim.fn.matchadd("TelescopeParent", "\t\t.*$")
+            vim.api.nvim_set_hl(0, "TelescopeParent", { link = "Comment" })
+          end)
+        end,
+      })
+
+      local function filename_first_path_display(_, path)
+        local tail = vim.fs.basename(path)
+        local parent = vim.fs.dirname(path)
+        if parent == "." then
+          return tail
+        else
+          return string.format("%s\t\t%s", tail, parent)
+        end
+      end
+
       require("telescope").setup {
         defaults = {
+          path_display = filename_first_path_display,
+          file_ignore_patterns = { "^.git/" },
           mappings = {
             i = {
               ["<esc>"] = "close",
@@ -94,7 +119,6 @@ return {
               ["<c-t>"] = require("trouble.providers.telescope").open_with_trouble,
             },
           },
-          file_ignore_patterns = { "^.git/" },
         },
         pickers = {
           buffers = {
@@ -125,6 +149,7 @@ return {
           },
         }
       }
+
       local builtin = require("telescope.builtin")
       vim.keymap.set("n", "<C-p>", builtin.find_files, {})
       vim.keymap.set("n", "<leader>fb", builtin.buffers, {})