Refactor Examples, updated readme (#174)

In this PR:
* Moved ITextRequestRouter and VectorTextIndex into typechat.examplesLib

README.md

@@ -128,9 +128,8 @@ The following examples demonstrate how to use JsonTranslator, Schemas and Vocabu
 
 ### Hierarchical schemas
 * [MultiSchema](./examples/MultiSchema): dynamically route user intent to other 'sub-apps'
-* [SchemaHierarchy](./examples/SchemaHierarchy): A Json Translator than uses multiple child JsonTranslators
-
-These examples also how [TextClassification](./examples/typechat.examplesLib/Classification) classes can be used to route text inputs to handlers.
+* [SchemaHierarchy](./examples/SchemaHierarchy): A Json Translator than uses multiple child JsonTranslators. For each user request, it picks the semantically ***nearest*** child translator and routes the input to it. 
+* [TextClassification](./examples/typechat.examplesLib/Classification) and [VectorTextIndex](./examples/typechat.examplesLib/VectorTextIndex.cs) show how to build a simple classifiers to route input.
 
 ### Json Programs
 

examples/typechat.examplesLib/Readme.md

@@ -8,6 +8,8 @@ Example classes include:
 
 * **HierarchicalJsonTranslator**: demonstrates how a  translator can use an in-memory vector index to semantically route request to child translators
 
+* **VectorizedTextIndex**: Demonstrates how to use an in-memory vectorized text index to route text requests
+
 * **PluginProgramTranslator**: Program translator that translates user requests into programs that call APIs defined by Microsoft Semantic Kernel Plugins
 
 * **PluginProgramValidator**: Validates programs produced by PluginProgramTranslator

src/typechat/Typescript.cs → src/typechat/Schema/Typescript.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Microsoft. All rights reserved.
 
-using Microsoft.TypeChat.Schema;
-
-namespace Microsoft.TypeChat;
+namespace Microsoft.TypeChat.Schema;
 
 /// <summary>
 /// Terminals, Operators etc, used to export Typescript
@@ -56,31 +54,31 @@ public static class Types
         {
             if (type.IsString())
             {
-                return Types.String;
+                return String;
             }
             else if (type.IsEnum)
             {
                 return null;
             }
             else if (type.IsNumber())
             {
-                return Types.Number;
+                return Number;
             }
             else if (type.IsBoolean())
             {
-                return Types.Boolean;
+                return Boolean;
             }
             else if (type.IsDateTime())
             {
-                return Types.String; // Json does not have a primitive DateTime
+                return String; // Json does not have a primitive DateTime
             }
             else if (type.IsObject())
             {
-                return Types.Any;
+                return Any;
             }
             else if (type.IsVoid())
             {
-                return Types.Void;
+                return Void;
             }
             return null;
         }