v1.56.0.1

Rust with Xtensa support 1.56.0 + patches from esp-rs/rust

• use install scripts from esp-rs/rust-build
• base image: https://hub.docker.com/r/espressif/idf-rust
• base image + examples: https://hub.docker.com/r/espressif/idf-rust-examples

Release v1.56.0-dev

Initial build of 1.56.0 - basic functionality working.
It's not possible to build rust-esp32-std-demo due to different version of libc. Please check 1.55.0 or newer release for STD support.

Release v1.55.0-dev

1.55.0 - tests in progress. For production please use 1.54.0