- 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/ShardStatus.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Diagnostics;
+
+namespace NadekoBot.Coordinator
+{
+    public sealed record ShardStatus(
+        int ShardId,
+        DateTime LastUpdate,
+        int GuildCount = 0,
+        ConnState State = ConnState.Disconnected,
+        bool ShouldRestart = false,
+        Process Process = null,
+        int StateCounter = 0
+    );
+}