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-core/build.rs

@@ -0,0 +1,13 @@
+use std::env;
+use std::path::Path;
+
+fn main() {
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+    let pkg_name = env::var("CARGO_PKG_NAME").unwrap();
+
+    cbindgen::generate(&crate_dir)
+        .expect("Unable to generate cbindgen bindings")
+        .write_to_file(
+            Path::new(&crate_dir).join("bindings").join(format!("{}.h", pkg_name))
+        );
+}