Updated System.Text.Json to latest version, and Readme (#159)

In this PR
- Bump System.Text.Json dependency to latest version
- Updated Readme for TypeChat.Dialog

README.md

@@ -74,7 +74,7 @@ TypeChat.SemanticKernel include classes for:
 * Language model and embeddings access: all TypeChat examples use the Semantic Kernel to call models and generate embeddings. 
 
 ## Microsoft.TypeChat.Dialog
-TypeChat.Dialog demonstrates how TypeChat.NET may be used for strongly typed interactions with message passing Agents or Bots. These agents can include features such as built in interaction history. 
+TypeChat.Dialog is an **early** version of a framework that demonstrates how TypeChat.NET may be used for strongly typed interactions with message passing Agents or Bots. These agents can include features such as built in interaction history. 
 
 ```
 // Create an agent with history

src/package/NUGET.md

@@ -1,6 +1,6 @@
-# TypeChat
+# TypeChat.NET
 
-TypeChat.NET brings the ideas of [TypeChat](https://github.com/microsoft/TypeChat) to .NET. 
+[TypeChat.NET](https://github.com/microsoft/typechat.net) brings the ideas of [TypeChat](https://github.com/microsoft/TypeChat) to .NET. 
 
 TypeChat.NET provides **cross platform** libraries that help you build natural language interfaces with language models using strong types and type validation. TypeChat provides:
 * Json Translation and validation.

src/typechat.dialog/Readme.md

@@ -1,10 +1,7 @@
-# Typechat.Dialog
-TypeChat.Dialog is an **early** version of framework desiged for strongly typed interactions with Agents with built in interaction history and other features. 
+# TypeChat.Dialog
+TypeChat.Dialog is an **early** version of a framework that demonstrates how TypeChat.NET may be used for strongly typed interactions with message passing Agents or Bots. These agents can include features such as built in interaction history. 
 
-* Agents pass messages to each other.
-* Agents work with models to process user requests
-
-The framework also includes classes for:
-* Maintaining message history
-* Text classification
-* Building token limited prompts
+TypeChat.Dialog includes classes and interfaces for:
+* Agents
+* Messages and message history.
+* Collecting relevant context that remains within character/token limits.

src/typechat/TypeChat.csproj

@@ -14,7 +14,7 @@
 
   <ItemGroup>
     <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
-    <PackageReference Include="System.Text.Json" Version="6.0.1" />
+    <PackageReference Include="System.Text.Json" Version="6.0.8" />
   </ItemGroup>
 
 </Project>