Add runtime support: don't only listen on /tmp/frajtano1, script to add peer

lib/agent.ex

@@ -49,6 +49,7 @@ defmodule Frajtano.Agent do
 
   @impl true
   def handle_call({:add_peer, path}, _from, state) do
+    # TODO: deduplicate peers by socket path
     case Peer.start(path) do
       {:ok, _} -> {:reply, :ok, state}
       {:error, error} -> {:reply, {:error, error}, state}