add feature to download catalog JSON from the agent or client

just logging this idea, not sure if we need it in the near term

would be similar to agent card in a2a which can be downloaded at runtime but realistically is copy and pasted into code somewhere

for web can expose as a file
for clients on mobile would have to be added to the protocol somehow

Look at the agent card download in a2a to understand the current JSON structure. Examine the protocol for mobile clients and the web file export mechanism. Determine where the catalog JSON is generated and how to expose it across different platforms.

Rédigé par le modèle d'indexation à partir du texte de l'issue.