[BUG] Typescript bindings : models

**Describe the bug**

The interface is well splited by package 
ex:

```
export interface SchemaType extends ISchemaType {
  package_1: {
    ModelA: ModelA;
  },
   package_2: {
    ModelB: ModelB;
  },
}
```

but seems the schema const is not 
ex:

```
export const schema: SchemaType = {
  package_1: {
    ModelA,
    ModelB
  }
}
```