Api when user leaves bot

Walkthrough

The changes introduce a new feature allowing users to leave a bot, including email notifications to bot owners. The implementation consists of updates to the email templates, a new asynchronous endpoint in the user router, and modifications to the account processor. Additionally, a notification template for bot owners is added, along with corresponding tests to ensure the functionality works as intended.

Changes

File	Change Summary
email.yaml	Added `member_left_bot_subject` and `member_left_bot_mail_body` entries for notifications on user departures.
kairon/api/app/routers/user.py	Introduced a new `leave_bot` asynchronous endpoint for users to leave a bot and send email notifications.
kairon/shared/account/data_objects.py	Added `leave_bot_owner_notification` field to the `MailTemplates` class for storing leave notifications.
kairon/shared/account/processor.py	Added `process_leave_bot` method to handle user leave logic and email template loading for notifications.
kairon/shared/utils.py	Introduced `__handle_member_left_bot` method for email generation and updated `format_and_send_mail` function.
template/emails/leaveBotOwnerNotification.html	Created an HTML template for bot owner notifications when a member leaves.
tests/integration_test/services_test.py	Added tests for various scenarios related to leaving a bot, including success and failure cases.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant UserRouter
    participant AccountProcessor
    participant MailUtility
    participant EmailService

    User->>UserRouter: Leave Bot Request
    UserRouter->>AccountProcessor: process_leave_bot(bot, user)
    AccountProcessor->>AccountProcessor: Validate User and Bot
    AccountProcessor->>MailUtility: Prepare Email Notification
    MailUtility->>EmailService: Send Email Notification
    UserRouter-->>User: Success Response

🐇 In the fields of code so bright,
A user leaves with pure delight.
Notifications sent with care,
To bot owners everywhere!
With templates new and tests to run,
The changes made, oh what fun! 🌟

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digiteinfotech / kairon