Add library with Rust bindings to target_f1 code (#68)

* Move flipper-core into a workspace

* Fix target build rules

* Add flipper-f1-sys library

* Add flipper-f1-sys dependency to flipper-core

* Remove apparently useless includes

* Build and export HAL statics

* Disable Rust dependency detection for target_f1 build

* Install libclang-10-dev in docker

* Build Rust libs every time

* remove duplicate sources from make

* clean build different example

* wip add example fn

* Implement rust_uart_write()

* fix rebuild instructions for target_f1

Co-authored-by: aanper <mail@s3f.ru>

Dockerfile

@@ -17,7 +17,7 @@ RUN apt-get update && \
         python \
         python-pip \
         libstdc++-arm-none-eabi-newlib \
-        curl && \
+        libclang-10-dev && \
     apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 RUN curl https://sh.rustup.rs -sSf | sh -s -- -y --profile=minimal --target thumbv7em-none-eabi thumbv7em-none-eabihf