feat(ProductCatalogAPI): add fields to pack/shared_bounds

CHANGELOG:

### Add
- [#1038](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1038) Add fields to pack/shared_bounds

Related card: https://trello.com/c/u5j0NiaA/1616-odooov-api-product-catalog-packs

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