Fix build and code structure improvements. New but essential UI functionality. CI improvements. Documentation improvements. AI module improvements.

src/__Libraries/StellaOps.Provenance/DocumentStubs.cs

@@ -106,6 +106,8 @@ public class DocumentObject : DocumentValue, IEnumerable<KeyValuePair<string, Do
 
     public IEnumerable<DocumentElement> Elements => _values.Select(kvp => new DocumentElement(kvp.Key, DocumentValue.Wrap(kvp.Value)));
 
+    public IEnumerable<string> Keys => _values.Keys;
+
     public bool Contains(string key) => ContainsKey(key);
 
     public bool ContainsKey(string key) => _values.ContainsKey(key);