- Bot now takes shard id (optional) and total shards (optional) command line arguments (changed from shard id and parent process id)

- Sharding with coordinator now works properly
- Documented creds.yml RestartCommand - it has no effect when coordinator is starting the bot
- Regenerated creds_example.yml
- Removed all db migrators as the v3 requires the user to have updated 2.x all the way
- TotalShards in creds.yml gets overriden by coord.yml's TotalShards if the bot is ran through coordinator (more precisely, by the command line argument to the bot)
- Coordinator now runs on http://localhost:3442 by default, you can change this in appsettings.json
    - This is done because of macos https issues
    - Primarily because https for regular users is a massive hassle. Coordinator shouldn't be exposed anyway
- Minor cleanup

src/NadekoBot/Services/Impl/RemoteGrpcCoordinator.cs

@@ -20,8 +20,11 @@ namespace NadekoBot.Services
 
         public RemoteGrpcCoordinator(IBotCredentials creds, DiscordSocketClient client)
         {
-            // todo should use credentials
-            var channel = Grpc.Net.Client.GrpcChannel.ForAddress("https://localhost:3443");
+            var coordUrl = string.IsNullOrWhiteSpace(creds.CoordinatorUrl)
+                ? "http://localhost:3442"
+                : creds.CoordinatorUrl;
+            
+            var channel = Grpc.Net.Client.GrpcChannel.ForAddress(coordUrl);
             _coordClient = new(channel);
             _client = client;
         }
@@ -29,8 +32,8 @@ namespace NadekoBot.Services
         public bool RestartBot()
         {
             _coordClient.RestartAllShards(new RestartAllRequest
-            { 
-
+            {
+                
             });
 
             return true;