Add a custom partition with binary resources

[nishanthkarthik]

At a high level this is what I am trying to do but I'm missing the specifics - My binary bundles a large resource that I end up flashing during debugging. espflash skips flashing a partition table entry if the hashes match. So I prefer splitting this blob into a different entry on the partition table and load it at runtime. That way, flashing during incremental development is quicker.

I am not sure where esp-hal and espflash fit into the picture. I think this is the implementation that generates and uses the partition table. I think I should add a CLI flag in espflash.

Has anyone used a rust based toolchain to flash binary resources into a different partition? I would appreciate any resources.