feat: add AWS SNS tool for publishing messages to SNS topics

[anatolyburtsev]

Summary

This PR adds a new AWS SNS (Simple Notification Service) tool to Flowise, enabling users to publish messages to AWS SNS topics directly from their workflows.

Features

• AWS SNS Integration: Publish messages to any AWS SNS topic
• Secure Credential Management: Uses Flowise's built-in AWS credential manager for secure authentication
• Dynamic Topic Discovery: Automatically loads and displays available SNS topics with a refresh button
• Multi-Region Support: Includes all major AWS regions with an easy-to-use dropdown selector
• Error Handling: Provides clear error messages for configuration and runtime issues

Implementation Details

• Created new tool in /packages/components/nodes/tools/AWSSNS/
• Added @aws-sdk/client-sns dependency to package.json
• Follows existing Flowise tool patterns (similar to Composio tool structure)
• Includes custom AWS-styled icon

Configuration

The tool requires:

1. AWS Credentials (via credential manager)
2. AWS Region selection
3. SNS Topic selection (dynamically loaded based on region and credentials)

Testing

• Build passes successfully
• Tool loads in Flowise UI
• Manual testing with actual AWS SNS topics

Screenshots

[HenryHengZJ]

looks good! do you have screenshots/recordings to showcase the demo?

[anatolyburtsev]

Of course, summarize webpage and send email with summary via AWS SNS.

whole flow:

Call it for one of flowise doc page:

It was successfully executed:

And I received a message to the email subscribed to AWS SNS topic:

[HenryHengZJ]

super awesome, thank you!