Review request for issue #52 Improve description of Generative AI elements

Dear all,

I completed my work on https://github.com/w3c/voiceinteraction/issues/52 
Improve description of Generative AI elements and would like to ask for 
a review. Maybe, you still see some room for improvement?

Changes are available at 
https://w3c.github.io/voiceinteraction/voice%20interaction%20drafts/paArchitecture/paArchitecture-1-3.htm

Here are some things that I changed

  * Section 3.2 Dialog Layer
      o Introduced 2 paths for Traditional NLU (figure 2a) and
        Generative AI (Figure 2b)
      o Introduced 2 new subsections to better structure the document
          + 3.2.4 Traditional NLU-based Systems
              # Old content but shifted to a new place
          + 3.2.5 Generative AI-based Systems
              # New content
  * Section 3.3.5 IPA Providers
      o No detailed insight about IPAs. so reddraw IPA Provider
        component and removed sections
          + Provider ASR
          + Provider NLU
          + Provider Intent Set
      o Redraw Figure 3
  * Section 5.1 Detailed Walkthrough for Traditional NLU Systems
      o Renamed heading to indicate it is for NLU only
      o Added hint about 2 ntaures of nested IPAs
  * Section 5.1.1 Walkthrough for the Input Path
      o Redraw figure
  * Section 5.1.2 Walkthrough for the Output Path
      o Redraw figure

Side note

  * As per my perception the concept of Agentig Applications are already
    covered by the External Data / Services / IPA Providers layer. We
    may want to add one or two sentences about that if you agree.

Thank you,
Dirk