Expose packs in catalog pricelist
CHANGELOG:
### ADDED
- [#867](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/867) Expose packs in catalog pricelist
Related card: https://trello.com/c/IJ1JJgqD/1376-identificar-en-lapi-de-cataleg-que-el-producte-pertany-a-un-pack
Edited by Pelayo García