Custom SMTP and Templates

[lohanidamodar]

What does this PR do?

RFC for

• custom SMTP per project
• Custom Email templates
• Custom SMS templates

Test Plan

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Related PRs and Issues

(If this PR is related to any other PR or resolves any issue or related to any issue link all related PR and issues here.)

• [x] I have read the Contributing Guidelines on issues?

[pietrodicaprio]

It would be awesome to have this merged, moreover would be even better to have it available in AW Cloud in order to send the emails from the project's domain instead of the global [email protected]

[stnguyen90]

@eldadfux can you merge this now or is there something else left to do?