WIP: Supervisor-based plugin base

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

lib/contrib/on_connect.ex

@@ -1,15 +1,13 @@
 defmodule Omnibot.Contrib.OnConnect do
-  use Omnibot.Plugin.GenServer
+  use Omnibot.Plugin
   require Logger
 
   @default_config [channels: :all, commands: []]
 
   @impl true
-  def on_msg(irc, msg) do
-    if msg.command == "001" do
-      Logger.debug("Got welcome message")
-      cfg()[:commands]
-      |> Enum.each(fn [cmd | params] -> Irc.send_msg(irc, cmd, params) end)
-    end
+  def on_msg(irc, %Irc.Msg {command: "001"}) do
+    Logger.info("Running OnConnect commands")
+    cfg()[:commands]
+    |> Enum.each(fn [cmd | params] -> Irc.send_msg(irc, cmd, params) end)
   end
 end