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/ShardedClient/Modules/PublicModule.cs

@@ -0,0 +1,17 @@
+using Discord.Commands;
+using System.Threading.Tasks;
+
+namespace ShardedClient.Modules
+{
+    // Remember to make your module reference the ShardedCommandContext
+    public class PublicModule : ModuleBase<ShardedCommandContext>
+    {
+        [Command("info")]
+        public async Task InfoAsync()
+        {
+            var msg = $@"Hi {Context.User}! There are currently {Context.Client.Shards.Count} shards!
+                This guild is being served by shard number {Context.Client.GetShardFor(Context.Guild).ShardId}";
+            await ReplyAsync(msg);
+        }
+    }
+}