Add support for reloading builds after Zana is restarted

[Wires77]

After Zana is restarted (or something else is happening, as this happens frquently), you can no longer use the reactions to view different pieces of gear, presumably because she only stores monitored posts in memory.

If those message ids would save to some type of database or even a file, you could monitor those posts again and reload the builds when someone clicks a reaction.