[Enhancement] Show currently executing jobs on homepage (#250)

* [WIP] Added PoC job table

* [WIP] hooked up tasks table with real data

* Added reload on websocket command

* Hooked it all up to a websocket

lib/pinchflat_web/telemetry.ex

@@ -19,6 +19,11 @@ defmodule PinchflatWeb.Telemetry do
     Supervisor.init(children, strategy: :one_for_one)
   end
 
+  @doc false
+  def job_state_change_broadcast(_event, _measure, _meta, _config) do
+    PinchflatWeb.Endpoint.broadcast("job:state", "change", nil)
+  end
+
   def metrics do
     [
       # Phoenix Metrics