Add karabiner complex modification (with home-manager)

modules/home.nix

@@ -93,6 +93,33 @@
     };
   };
 
+  home.file.karabiner = {
+    target = ".config/karabiner/assets/complex_modifications/df_escape.json";
+    text = builtins.toJSON {
+      title = "Simultaneously press f + d to escape";
+      rules = [{
+        description = "Simultaneously press f + d to escape";
+        manipulators = [
+          {
+            type = "basic";
+            from = {
+              modifiers = {
+                optional = [ "any" ];
+              };
+              simultaneous = [
+                { key_code = "f"; }
+                { key_code = "d"; }
+              ];
+            };
+            to = [
+              { key_code = "escape"; }
+            ];
+          }
+        ];
+      }];
+    };
+  };
+
   programs = {
     fzf = {
       enable = true;