Add javascript shells

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

flake.nix

@@ -80,7 +80,9 @@
       in
       {
         devShells = {
+          bun = import ./hosts/common/system/shells/bun { inherit pkgs; };
           nix = import ./hosts/common/system/shells/nix { inherit pkgs; };
+          nodejs = import ./hosts/common/system/shells/nodejs { inherit pkgs; };
           python = import ./hosts/common/system/shells/python { inherit pkgs; };
         };