feat(templates): add cmake-c

flake.nix

@@ -238,6 +238,10 @@
           Before running nix build, make sure to run `cargo generate-lockfile` first.
         '';
       };
+      cmake-c = {
+        path = ./templates/cmake-c;
+        description = "A simple cmake c project.";
+      };
     };
   };
 }