Ottehr - Intake - Configure SendGrid for Participant Invite Emails

[DenysMyrosh]

Tested on:
Env: development
Hash: a41892e
Version: 0.16.0

Description:
When a patient invites a participant to a telemedicine video call, an email with an invite link should be sent to the participant, allowing them to join the call. Currently, no email is received by the invited participant due to the absence of a proper SendGrid setup. This issue is a continuation of the previous "Intake - impossible to invite participant to video call" ticket.

Steps to Reproduce:

1. Patient initiates a telemedicine call in the Intake flow.
2. Patient clicks on "Manage Participants" and selects "Add participant" with all required data.
3. Complete the invite process.

Expected Result:
The participant receives an email with an invite link to join the video call.

Actual Result:
No email is received by the participant, as SendGrid is not configured to send the invite.

Suggested Action:
Set up SendGrid to send the invite link to participants upon their addition to the telemedicine call.