Adding Entity guides, flowcharts, better sample system. (#2054)

* initial

* Interaction glossary entry

* Sharded Interaction sample

* Renames into solution

* Debugging samples

* Modify target location for webhookclient

* Finalizing docs work, resolving docfx errors.

* Adding threaduser to user chart

* Add branch info to readme.

* Edits to user chart

* Resolve format for glossary entries

* Patch sln target

* Issue with file naming fixed

* Patch 1/x for builds

* Appending suggestions

samples/TextCommandFramework/Services/PictureService.cs

@@ -0,0 +1,20 @@
+using System.IO;
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace TextCommandFramework.Services
+{
+    public class PictureService
+    {
+        private readonly HttpClient _http;
+
+        public PictureService(HttpClient http)
+            => _http = http;
+
+        public async Task<Stream> GetCatPictureAsync()
+        {
+            var resp = await _http.GetAsync("https://cataas.com/cat");
+            return await resp.Content.ReadAsStreamAsync();
+        }
+    }
+}