Is your feature request related to a problem? Please describe.
Currently only the JDK HTTP Client is supported for the A2AHttpClient implementation. We should be able to provide one using Vert.x which would make more sense in a Quarkus environment.
Describe the solution you'd like
Use the Vert.x Web Client to provide such an implementation
Describe alternatives you've considered
No response
Additional context
No response
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