Read/Write ESP flash partition table in Rust

This crates allows the following manipulations with ESP partition table:

• Read partition entries
• Validate partition table
• Write partition entries
• Write validation entry

You can manipulate partition entries:

• Directly in device flash
• Using byte buffers

The following features help customize this crate for you usecase:

• embedded-storage - enables access to partition table using corresponding API
• md5 - enables validation support using MD5 checksums
• heapless - enables using types from heapless crate