- NadekoBot class renamed to Bot

- Implemented grpc based coordinator. Supports restarting, killing single or all shards, as well as getting current shard statuses. (Adaptation of the one used by the public bot)
- Coord is setup via coord.yml file
- Methods from SelfService which deal with shard/bot restart etc have been moved to ICoordinator (with GrpcRemoteCoordinator being the default implementation atm)
- Vastly simplified NadekoBot/Program.cs

src/NadekoBot.Coordinator/Shared/JsonStatusObject.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace NadekoBot.Coordinator
+{
+    public class JsonStatusObject
+    {
+        public int? Pid { get; init; }
+        public int GuildCount { get; init; }
+        public ConnState ConnectionState { get; init; }
+    }
+}