New VA108xx Rust workspace structure + dependency updates

- The workspace is now a monorepo without submodules. The HAL, PAC and BSP
  are integrated directly
- Update all dependencies: embedded-hal v1 and RTIC v2

automation/Dockerfile

@@ -0,0 +1,13 @@
+# Run the following commands from root directory to build and run locally
+# docker build -f automation/Dockerfile -t <NAME> .
+# docker run -it <NAME>
+FROM rust:latest
+RUN apt-get update
+RUN apt-get --yes upgrade
+# tzdata is a dependency, won't install otherwise
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN rustup install nightly && \
+	rustup target add thumbv6m-none-eabi && \
+	rustup +nightly target add thumbv6m-none-eabi && \
+	rustup component add rustfmt clippy