nanopb - Protocol Buffers with small code size

[zamazan4ik]

https://github.com/nanopb/nanopb

Library for working with Protobuf for small devices (like STM32).

Has CMakeLists.txt with no dependencies, so should be easy to make recipe for this.

[danimtb]

There is ongoing work in the original repository.

Here you have the issue asking for Conan support: nanopb/nanopb#294 You can find there the PR adding the initial support for Conan

cc/ @shreyasbharath