feat(ci): initial workflow

Author: Karrq

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+
+jobs:
+  test:
+    name: Test Solana & Anchor CLI
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        # https://docs.github.com/en/actions/using-github-hosted-runners/using-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
+        os: [ubuntu-24.04, ubuntu-24.04-arm, windows-latest, windows-11-arm, macos-13, macos-latest]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+
+      - name: Enable Nix Flakes
+        run: |
+          echo "experimental-features = nix-command flakes" | sudo tee -a /etc/nix/nix.conf
+          sudo systemctl restart nix-daemon || true
+
+      - name: Test Solana CLI
+        run: |
+          nix run .#solana-cli -- --version
+
+      - name: Test Anchor CLI
+        run: |
+          nix run .#anchor-cli -- --version