Add GitHub Actions workflow for Zig build process

.github/workflows/zig-build.yml

@@ -0,0 +1,44 @@
+name: Zig Build
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        board: [pico, pico_w, pico2, pico2_w]
+        optimize: [Debug, ReleaseSafe, ReleaseFast, ReleaseSmall]
+        zig: [latest]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Zig Compiler
+        uses: mlugg/[email protected]
+        with:
+          version: ${{ matrix.zig }}
+
+      - name: Cache Toolchains
+        id: cache-primes
+        uses: actions/cache@v4
+        with:
+          path: ./build/${{ matrix.board }}/${{ matrix.optimize }}/toolchain
+          key: ${{ matrix.board }}-${{ matrix.optimize }}-toolchain
+
+      - name: Build
+        run: zig build -Dboard=${{ matrix.board }} -Doptimize=${{ matrix.optimize }} -Dbuild_dir=./build/${{ matrix.board }}/${{ matrix.optimize }}
+
+      - name: Upload Build
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-${{ matrix.board }}-${{ matrix.optimize }}
+          path: "./build/${{ matrix.board }}/${{ matrix.optimize }}\n!./build/${{ matrix.board }}/${{ matrix.optimize }}/toolchain"