fix(devshell): add local bin folder to PATH via shellHook

flake.nix

@@ -89,12 +89,9 @@
               pkgs.sops
             ];
 
-            packages = [
+            shellHook = ''
-              (pkgs.symlinkJoin {
+              export PATH=${builtins.toPath ./bin}:$PATH
-                name = "deploy-bin";
+            '';
-                paths = [ ./bin ];
-              })
-            ];
           };
         }
       );