[ADD] Mail activity team module

CHANGELOG:

### Added
- [#1262](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1262) Add mail activity team

Related card: https://trello.com/c/97FeGbLj/1902-afegir-camp-nivell-a-model-mailactivity

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