[Feat]: Create new feature branch A2A protocol

### Is your feature request related to a problem? Please describe.

As mentioned in https://github.com/a2aproject/A2A/issues/1925 - proposal, We need a feature branch to merge the PRs a developer branch.

https://github.com/a2aproject/A2A/issues/1925

### Describe the solution you'd like

Create a feature branch

### Describe alternatives you've considered

_No response_

### Additional context

_No response_

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct