Add FLUX Fill starter model.

Author: RyanJDick

invokeai/backend/model_manager/starter_models.py

@@ -624,6 +624,16 @@ class StarterModelBundles(BaseModel):
 )
 # endregion
 
+# region FLUX Fill
+flux_fill = StarterModel(
+    name="FLUX Fill",
+    base=BaseModelType.Flux,
+    source="black-forest-labs/FLUX.1-Fill-dev::flux1-fill-dev.safetensors",
+    description="FLUX Fill model (for inpainting).",
+    type=ModelType.Main,
+)
+# endregion
+
 # List of starter models, displayed on the frontend.
 # The order/sort of this list is not changed by the frontend - set it how you want it here.
 STARTER_MODELS: list[StarterModel] = [
@@ -694,6 +704,7 @@ class StarterModelBundles(BaseModel):
     siglip,
     flux_redux,
     llava_onevision,
+    flux_fill,
 ]
 
 sd1_bundle: list[StarterModel] = [
@@ -742,6 +753,7 @@ class StarterModelBundles(BaseModel):
     flux_canny_control_lora,
     flux_depth_control_lora,
     flux_redux,
+    flux_fill,
 ]
 
 STARTER_BUNDLES: dict[str, list[StarterModel]] = {