emacs: add rustic

i like coding in rust, very nice language :)

package/config.org

@@ -271,6 +271,13 @@ Enabling Emacs-LSP to use LSPs, I am very dry on syntax highlighters right now.
   (use-package nix-ts-mode
     :mode "\\.nix\\'")
   
+#+END_SRC
+*** Rust
+#+BEGIN_SRC emacs-lisp
+  (use-package rustic
+    :mode "\\.rs\\'"
+    :hook (rust-mode . (lambda () (setq indent-tabs-mode nil))))
+    
 #+END_SRC
 * Which-key
 Amazing tool, love it a bunch.

package/default.nix

@@ -34,6 +34,7 @@ pkgs.emacsWithPackagesFromUsePackage {
       treemacs-projectile
       magit
       treemacs-magit
+      rustic
     ];
   override = _: prev: { use-package = prev.emacs; };
 }