Allow changing ESP32 partition table without rebuilding AtomVM

[bettio]

When flashing something like a 4MB image on a 16MB flash it can be useful to automatically resize/grow the main.avm partition so it can use all the available flash space.

[UncleGrumpy]

I have started a set of tools that has this functionality working. Some of the NVS related tooling is still WIP (lookup of key values by name for example), but the partition table reading/editing is already working. You can look at UncleGrumpy/eee_tools and see about using this as a dependency. Once everything is more polished I would be happy to reassign ownership to the AtomVM org.

I was already planning on using this in the rebar3 plugin as well.

[UncleGrumpy]

I would be happy to take suggestions on how to improve the API for external use. I started it as an escript project, so there is probably room for improvement as far as API use is concerned.