treewide: format all files (#57)

Run `nix fmt` at the root of the repository to format all files. I've
done this on my fork and this will help me merge your changes later
without having to deal with un-formatted files.

config/plugins/cmp/autopairs.nix

@@ -2,7 +2,10 @@
   plugins.nvim-autopairs = {
     enable = true;
     settings = {
-      disable_filetype = ["TelescopePrompt" "vim"];
+      disable_filetype = [
+        "TelescopePrompt"
+        "vim"
+      ];
     };
   };
 }