Migrate '.vim/ftdetect/prolog' to neovim

.config/nvim/lua/ftdetect.lua

@@ -7,5 +7,6 @@ vim.filetype.add({
     [".*/%.vscode/.*%.json"] = "jsonc",
     [".*/%.ssh/config%.d/.*"] = "sshconfig",
     ["%.env.*"] = "dotenv",
+    ["%.pl$"] = "prolog",
   },
 })

.vim/ftdetect/prolog.vim

@@ -1 +0,0 @@
-autocmd BufNewFile,BufReadPost *.pl set filetype=prolog