`bootloader-tool` is still missing CI coverage and `README` needs to be updated. But the core library looks good. Let's merge it in for now to unblock our partners and create issues to follow up.

[jerrysxie]

bootloader-tool is still missing CI coverage and README needs to be updated. But the core library looks good. Let's merge it in for now to unblock our partners and create issues to follow up.

bootloader-tool is marked as experimental and README is marked as outdated.

Originally posted by @jerrysxie in #19 (review)