plugins/molten: add wezterm as image provider

plugins/by-name/molten/default.nix

@@ -1,4 +1,5 @@
 {
+  config,
   lib,
   helpers,
   ...
@@ -80,6 +81,7 @@ mkVimPlugin {
         [
           "none"
           "image.nvim"
+          "wezterm"
         ]
         ''
           How images are displayed.
@@ -236,5 +238,13 @@ mkVimPlugin {
     };
   };
 
-  extraConfig = cfg: { extraPython3Packages = cfg.python3Dependencies; };
+  extraConfig = cfg: {
+    extraPython3Packages = cfg.python3Dependencies;
+
+    warnings =
+      lib.optional (cfg.settings.image_provider == "wezterm" && !config.plugins.wezterm.enable)
+        ''
+          Nixvim (plugins.molten): The `wezterm` plugin is not enabled, so the `molten` plugin's `image_provider` setting will have no effect.
+        '';
+  };
 }