Add models information to default workflow. (#321)

* Add models information to default workflow.

* Add models to zod schema.

* Fix zod schema.

* Update schema name.

* Add z prefix to modelfile schema name.

src/types/comfyWorkflow.ts

@@ -1,6 +1,15 @@
 import { z } from 'zod'
 import { fromZodError } from 'zod-validation-error'
 
+// Definition of an AI model file used in the workflow.
+const zModelFile = z.object({
+  name: z.string(),
+  url: z.string().url(),
+  hash: z.string(),
+  hash_type: z.string(),
+  directory: z.string()
+})
+
 const zComfyLink = z.tuple([
   z.number(), // Link id
   z.number(), // Node id of source node
@@ -121,7 +130,8 @@ export const zComfyWorkflow = z
     groups: z.array(zGroup).optional(),
     config: zConfig.optional().nullable(),
     extra: zExtra.optional().nullable(),
-    version: z.number()
+    version: z.number(),
+    models: z.array(zModelFile).optional()
   })
   .passthrough()