FEAT Refactored XPIA orchestrator as a workflow

[bashirpartovi]

Description

• Refactored XPIAOrchestrator as XPIAWorkflow
• Added the capability to use both request and response converters

Old Implementation

xpia_orchestrator = XPIATestOrchestrator(
    attack_content=jailbreak_prompt,
    processing_prompt=processing_prompt_template,
    processing_target=processing_target,
    attack_setup_target=abs_target,
    scorer=scorer,
)
score = await xpia_orchestrator.execute_async()

New Implementation

workflow = XPIATestWorkflow(
    attack_setup_target=abs_target,
    processing_target=processing_target,
    scorer=scorer,
)
result = await workflow.execute_async(
    attack_content=jailbreak_prompt,
    processing_prompt=processing_prompt_template,
)
# Access score via: result.score