Link external organizations and contacts to issues
### Release Notes GitLab 15.0 introduces the first [MVC](https://about.gitlab.com/handbook/product/product-principles/#the-minimal-viable-change-mvc) towards adding more robust support for [managing and billing external customers from within GitLab](https://gitlab.com/groups/gitlab-org/-/epics/5323). The customer relations management capabilities (CRM) allow you to create organizations and contacts, set a default bill rate for an organization, associate contacts to organizations, and link contacts directly to issues via a `/add_contacts` quick action. Once a contact is added to one or more issues, you can view all issues associated with a given contact or organization. For now, the customer relations feature is not enabled by default and can only be managed within a top-level Group. To get started creating organizations and contacts, head to a top-level group and [follow these steps](https://docs.gitlab.com/ee/user/crm/#enable-customer-relations-management-crm). Once enabled, anyone with the role of `Reporter` or higher can manage contacts and organizations in the top-level group, associate contacts to issues within a group's projects, and see a list of all issues linked to an organization or contact. Thanks `@leeticket` for the dozens of contributions and countless hours spent leading this effort! https://docs.gitlab.com/ee/user/crm/
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