feat(zsh): enable auto-completion/suggestions

home-manager/zsh.nix

@@ -3,18 +3,12 @@
 {
   programs.zsh = {
     enable = true;
-    enableSyntaxHighlighting = true;
+    enableAutosuggestions = true;
+    enableCompletion = true;
     history.size = 10000;
 
     shellAliases = {
       ls = "exa --group-directories-first --git";
     };
-
-    oh-my-zsh = {
-      enable = true;
-      plugins = [
-        "vi-mode"
-      ];
-    };
   };
 }