helloworld: Add zig version, tests, and CI #2

	name: Build and test programs

	on: [pull_request, push]

	env:
	SOLANA_ZIG_VERSION: v1.43.0
	SOLANA_ZIG_DIR: solana-zig

	jobs:
	zig-test:
	name: Run tests against Zig implementations
	strategy:
	matrix:
	program: [helloworld]
	fail-fast: false
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/cache@v4
	with:
	path: \|
	~/.cargo/registry
	~/.cargo/git
	$SOLANA_ZIG_DIR
	key: zig-${{ hashFiles('./Cargo.lock') }}-$SOLANA_ZIG_VERSION

	- name: Download solana-zig compiler
	shell: bash
	run: SOLANA_ZIG_VERSION=$SOLANA_ZIG_VERSION ./install-solana-zig.sh $SOLANA_ZIG_DIR

	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: 1.78.0

	- name: Install build deps
	run: ./install-rust-build-deps.sh

	- name: Build and test program
	run: ./test-zig.sh ${{ matrix.program }}

	rust-test:
	name: Run tests against Rust implementations
	strategy:
	matrix:
	program: [helloworld]
	fail-fast: false
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/cache@v4
	with:
	path: \|
	~/.cargo/registry
	~/.cargo/git
	key: rust-${{ hashFiles('./Cargo.lock') }}

	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: 1.78.0

	- name: Install Rust build deps
	run: ./install-rust-build-deps.sh

	- name: Install Solana
	run: ./install-solana.sh

	- name: Build and test program
	run: cd ${{ matrix.program }} && cargo test-sbf

Provide feedback