Some more updates on the paArchitecture document 2024-11-18

Hey there,

I made some changes to 
https://w3c.github.io/voiceinteraction/voice%20interaction%20drafts/paArchitecture/paArchitecture-1-3.htm. 
Please, review them and let me know in case something should be 
described better

  * https://github.com/w3c/voiceinteraction/issues/63 Interoperability
      o Section 2.1.2
          + Removed TODOs for Interoperability
      o Section 3.3.1.2 Provider Registry
          + Add some hint about discovery to the provider registry component
          + Add hint to OVON assistant manifest
  * https://github.com/w3c/voiceinteraction/issues/61 Generative AI Use Case
      o Section 2.1.3 In-Vehicle Chatbot
          + Added a hint on LLMs and GenAI
  * https://github.com/w3c/voiceinteraction/issues/58 Clarify meaning of
    IPA in the document
      o Section 1 Introduction
          + Added a paragraph to detail how IPA is meant and used in the
            document

Thank you

Dirk