[Fullstack] - Send out invite emails for orgs

[bderbs30]

Description

We want the ability to send out email invites for members to join an organization. When a member is apart of an organization and wants to invite another user - they should be able to go through a flow to invite this user

References

https://www.better-auth.com/docs/plugins/organization#invitation-hooks

Acceptance Criteria

• When inviting a user an email is sent to them via the sarge domain - they're able to click this invite link and redirect to the application
• The role they're assigned is aligned with the role selected when inviting them through the flow

Blocked by

#57