fix: added sendNotificationV3

[akp111]

Fixes Issue

Changes proposed

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• My code follows the code style of this project.
• My change requires changes to the documentation.
• I have updated the documentation accordingly.
• This PR does not contain plagiarized content.
• The title of my pull request is a short description of the requested changes.

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Note to reviewers

[github-actions]

In the helpers.ts file:

1. There are several missing closing curly braces } after each spread operator of inputOptions?.payload properties. They need to be added.
2. The default case inside the switch (senderType) statement is missing a closing curly brace }. It should be added.
3. The switch (senderType) statement seems to be incomplete as it lacks the necessary cases for handling different senderType values. It needs to be revised to include all cases.
4. The throw new Error('Invalid SenderType'); statement inside the case 1 of the switch (senderType) statement should be moved outside the switch block.
5. The getVerificationProofV2 function is missing a closing curly brace } at the end.
6. The getSource function seems incomplete as it lacks implementation details for handling different scenarios based on senderType and identityType.

In the other files, no issues were found.

Therefore, the corrections need to be made in the helpers.ts file, while the rest of the files seem to be fine.

All looks good.