modules/nvim-cmp: add perFiletype settings

modules/plugins/nvim-cmp.nix

@@ -16,6 +16,11 @@ in
       type = types.attrs;
       default = { };
     };
+
+    perFiletype = mkOption {
+      type = types.attrOf types.attrs;
+      default = {};
+    };
   };
 
 
@@ -96,6 +101,9 @@ in
           cfg.settings
           { snippet.expand = config.fn.nvim-cmp-snippet-expand.lambda; }
         ];
+        afterSetup = lib.flip lib.mapAttrs cfg.perFiletype (ft: ftSettings:
+          (pipe1 cfg.var (call "setup.filetype" [ft ftSettings]))
+        );
       };
     }