Add feature Websocket Support

[mmjsmohit]

PR Description

This pull request introduces basic support for WebSockets, following the specifications discussed in issue #15. The changes include modifications to tests to align with the new request and response model. While the initial implementation is in place, there are still some outstanding issues that need resolution, along with additional test coverage.

Key Changes

1. WebSocket Integration: The PR establishes bidirectional communication channels between clients and servers using the WebSocket protocol. This enables real-time data exchange without breaking the connection or requiring additional HTTP requests.

2. Test Updates: The existing tests have been adapted to match the new request and response patterns. However, further testing and validation are necessary to ensure robustness.

Next Steps

1. Write Tests: Comprehensive test coverage is essential. We need to create test cases that cover various scenarios, including edge cases.
2. Enhance UI: I would like to enhance the UI including adding icons for protocols and improving the user experience for dealing with realtime API testing.
3. Error Handling: Build robust error handling for Websockets.

Related Issues

• Related Issue Feature request: Websocket Support #15

Checklist

• I have gone through the contributing guide
• 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
• I need help with writing tests

[sebastianbuechler]

@mmjsmohit I just checked out your PR and I'm afraid there are major issues with the core WebSocket support. I'm getting null check errors through much of the testing and basic feature like connection states for multiple connections are wrong. Since my PR (#210) is already fully functional maybe we can see how to integrate with eachother. What do you think?

[animator]

@mmjsmohit Please make this change #307

[ashitaprasad]

@mmjsmohit Can you please resolve the conflicts and let us know

[ashitaprasad]

@mmjsmohit There is an issue in the state management. Every time, I create a new Websocket request, it shows connected even when no data has been entered. This should not happen. Also, currently there are a lot of conflicts that need to be resolved. So, I am closing this PR.
Please make a new PR resolving all the issues.

[mmjsmohit]

Sure @ashitaprasad! Will make a new PR with resolved conflicts and issues after I finish implementing MQTT.