added assertion to make sure ccc and otter aren't enabled at the same time

modules/plugins/lsp/otter/config.nix

@@ -14,6 +14,14 @@
   mappings = addDescriptionsToMappings cfg.otter.mappings mappingDefinitions;
 in {
   config = mkIf (cfg.enable && cfg.otter.enable) {
+    assertions = [
+      {
+        assertion = !config.vim.utility.ccc.enable;
+        message = ''
+          ccc and otter have a breaking conflict. It's been reported upstream. Until it's fixed, disable one of them
+        '';
+      }
+    ];
     vim = {
       startPlugins = ["otter-nvim"];