PoC : mqtt,websocket and gRPC

[badnikhil]

PR Description

• Key Changes:

• Polymorphic Protocol Architecture: Re-engineered RequestModel using a modular ProtocolModel system to scale beyond REST.
• Multi-Protocol Support: Added native integration for MQTT (v5/v3), gRPC (Reflection/Streaming), and WebSockets.
• Centralized Connection Management: Introduced a singleton ConnectionManager to handle the lifecycle and cleanup of persistent socket/channel connections.
• Live Event Streaming: Implemented a unified EventStreamView UI to track real-time message logs (Sent/Received/Errors) across all protocols.
• State Decoupling: Moved protocol-specific data into specialized models to minimize state pollution in the core application logic.

Related Issues

• Closes #

Checklist

• I have gone through the contributing guide
• I have updated my branch and synced it with project main branch before making this PR
• I am using the latest Flutter stable branch (run flutter upgrade and verify)
• I have run the tests (flutter test) and all tests are passing

Added/updated tests?

We encourage you to add relevant test cases.

• Yes
• No, and this is why: please replace this line with details on why tests have not been included

OS on which you have developed and tested the feature?

• Windows
• macOS
• Linux

[badnikhil]

@animator gRPC responses are currently raw binary , but I’ll add the decoder to make them human-readable soon..

I forgot to unhide the cursor but the demonstration is clear enough.
Screencast from 2026-04-12 21-05-08.webm

[badnikhil]

Finally the binary decoding is implemented. and We have very good parameter extraction / decoding.