Add comprehensive CI/CD workflows and configuration files #2

	# This workflow checks the `a121-sys` crate for `no_std` compatibility.
	# It ensures that the crate can be compiled in a `no_std` environment, which is
	# essential for embedded applications.
	# See check.yml for details on concurrency cancellation and workflow triggering.
	permissions:
	contents: read
	on:
	push:
	branches: [main]
	pull_request:
	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true
	name: no_std_check

	env:
	CPATH: "/usr/lib/arm-none-eabi/include"

	jobs:
	compile_no_std:
	runs-on: ubuntu-latest
	name: Compile no_std ${{ matrix.target }}
	strategy:
	matrix:
	target: [thumbv7em-none-eabihf]
	steps:
	- uses: actions/checkout@v2
	with:
	submodules: true

	- name: Setup Rust toolchain
	uses: actions-rs/toolchain@v1
	with:
	toolchain: stable
	override: true
	target: ${{ matrix.target }}

	- name: Install ARM GCC and Clang
	run: \|
	sudo apt-get update
	sudo apt-get install -y gcc-arm-none-eabi clang

	- name: Add target for no_std build
	uses: actions-rs/target@v1
	with:
	target: ${{ matrix.target }}

	- name: Check build for no_std compatibility
	uses: actions-rs/cargo@v1
	with:
	command: check
	args: --target ${{ matrix.target }} --no-default-features

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