Send notifications by email

[Yurii-Midianyi]

GreenCity PR

Link on issue 6587

Summary Of Changes 🔥

Standardized email sending fucntionality.
Added overloaded method for sending email notifications. It works in a parallel thread.
Added basic email notifications for such actions:

• Eco news created
• Eco news liked
• Eco news commented
• Reply to comments
• Like of a comment
• Event created
• Event commented
• Event was changed, then every attender receives a notifications
• Event was canceled, then every attender receives a notifications
• New attender joins your event
• New friend request
• Friend request accepted

Related tests were rewritten

PR Checklist Forms

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• Code is up-to-date with the dev branch.
• You've successfully built and run the tests locally.
• There are new or updated unit tests validating the change.
• JIRA/ Github Issue number & title in PR title (ISSUE-XXXX: Ticket title)
• This template filled (above this section).
• Sonar's report does not contain bugs, vulnerabilities, security issues, code smells ar duplication
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[sonarqubecloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud