feat: make soonix a bit more flexible with and without devshell

nix/repo/devShells.nix

@@ -4,6 +4,7 @@
   ...
 }: let
   inherit (inputs) pkgs devshell soonix treefmt;
+  soonixShellHook = cell.soonix.shellHook;
 in {
   default = devshell.mkShell {
     imports = [soonix.devshellModule];
@@ -17,19 +18,6 @@ in {
         };
       })
     ];
-
-    soonix.hooks.test = {
-      output = "test.yaml";
-      generator = "nix";
-      data = {
-        name = "soonix-test";
-        version = "1.0.0";
-      };
-      opts.format = "yaml";
-      hook = {
-        mode = "copy";
-        gitignore = true;
-      };
-    };
+    inherit soonixShellHook;
   };
 }