nix: switch to alejandra formatter

Signed-off-by: Myned <dev@bjork.tech>

flake.in.nix

@@ -101,8 +101,10 @@
 
   outputs = inputs: {
     # TODO: Use forAllSystems
+    # FIXME: nixd always uses nixfmt when importing flakes
     # https://nix.dev/manual/nix/2.18/command-ref/new-cli/nix3-fmt
-    formatter.x86_64-linux = inputs.nixpkgs-unstable.legacyPackages.x86_64-linux.nixfmt-rfc-style;
+    # https://github.com/kamadorueda/alejandra/blob/main/STYLE.md
+    formatter.x86_64-linux = inputs.nixpkgs-unstable.legacyPackages.x86_64-linux.alejandra;
 
     nixosConfigurations =
       let

options/custom/programs/vscode.nix

@@ -67,9 +67,9 @@ in
     home = {
       # Extension dependencies
       packages = with pkgs; [
+        alejandra # nix-ide
         blueprint-compiler # blueprint-gtk
         nixd # nix-ide
-        nixfmt-rfc-style # nix-ide
         shfmt # shell-format
       ];
 

options/custom/settings/packages.nix

@@ -26,11 +26,11 @@ in
           # CLI applications
           config.boot.kernelPackages.cpupower # Install for current kernel
 
+          alejandra
           fd
           fzf
           jq
           lm_sensors # sensors
-          nixfmt-rfc-style # nixfmt
           nix-output-monitor # nom
           nix-tree
           nmap