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>

core-rs/flipper-f1-sys/src/lib.rs

@@ -0,0 +1,20 @@
+#![no_std]
+
+#![allow(dead_code)]
+#![allow(non_camel_case_types)]
+#![allow(non_upper_case_globals)]
+
+pub mod cmsis_os {
+    #[allow(non_camel_case_types)]
+    pub use core::ffi::c_void;
+
+    #[allow(non_camel_case_types)]
+    pub type c_char = i8;
+
+    include!(concat!(env!("OUT_DIR"), "/cmsis_os_bindings.rs"));
+}
+
+pub mod hal {
+    include!(concat!(env!("OUT_DIR"), "/stm32_hal_bindings.rs"));
+    include!(concat!(env!("OUT_DIR"), "/stm32_hal_statics.rs"));
+}