[SSF-159] - Automated Emails 1 Implementation

[dburkhart07]

ℹ️ Issue

Closes #159

📝 Description

• Created an email template to store an arbitrary amount of parameters to be used in the subject and body
• Created temporary placeholders for ssf email, as well as base url (both to be later changed when we switch to production)
• Implemented automated email sending workflows for creating a volunteer, submitting a pantry/fm application, getting a pantry/fm application approved, and submitting a food request
• Wrote food manufacturer tests

✔️ Verification

BEFORE TESTING: Add 2 new environment variables:

• AWS_SES_SENDER_EMAIL (set this to one of your emails, this will be the address that sends the emails for you to verify)
• SEND_AUTOMATED_EMAILS (switch this to true to turn on Cognito account creation and email sending permissions)

Tested each workflow to ensure the proper sender, subject, message, attachments were all there.

🏕️ (Optional) Future Work / Notes

Should figure out why this email gets sent to spam by default