Add .NET Connector and .NET Agent example (#4)

Add .NET connector, taking care of all the details to connect an agent to Semantic Workbench.

Add agent example, showing how to leverage the connector. 

The .NET agent implements a basic "echo" behavior, repeating what the user says in a conversation, and supports a simple `/say` command showing how to leverage commands.

.gitignore

@@ -6,13 +6,17 @@
 *.local
 *__local__*
 .data/
+.idea/
+appsettings.*.json
 
 # Dependencies and build cache
 node_modules
 poetry.lock
 __pycache__
 .pytest_cache
 .cache
+bin/
+obj/
 
 # Logs
 *.log

dotnet/SemanticWorkbench.sln

@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WorkbenchConnector", "WorkbenchConnector\WorkbenchConnector.csproj", "{F7DBFD56-5A7C-41D1-8F0A-B00E51477E19}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AgentExample01", "..\examples\dotnet-example01\AgentExample01.csproj", "{3A6FE36E-B186-458C-984B-C1BBF4BFB440}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{F7DBFD56-5A7C-41D1-8F0A-B00E51477E19}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F7DBFD56-5A7C-41D1-8F0A-B00E51477E19}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F7DBFD56-5A7C-41D1-8F0A-B00E51477E19}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F7DBFD56-5A7C-41D1-8F0A-B00E51477E19}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3A6FE36E-B186-458C-984B-C1BBF4BFB440}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3A6FE36E-B186-458C-984B-C1BBF4BFB440}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3A6FE36E-B186-458C-984B-C1BBF4BFB440}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3A6FE36E-B186-458C-984B-C1BBF4BFB440}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

dotnet/SemanticWorkbench.sln.DotSettings

@@ -0,0 +1,2 @@
+<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=CORS/@EntryIndexedValue">CORS</s:String></wpf:ResourceDictionary>