feat: do platform tests

.github/workflows/platforms.yaml

@@ -0,0 +1,69 @@
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+name: run platform tests
+jobs:
+  test:
+
+    strategy:
+      matrix:
+        matrix:
+          os:
+            - darwin
+            - linux
+            - windows
+          arch:
+            - 386
+            - amd64
+            - arm
+            - arm64
+            - ppc64le
+            - s390x
+          include:
+            - os: linux
+              arch: arm
+              arm: 7
+          exclude:
+            - os: darwin
+              arch: 386
+            - os: darwin
+              arch: arm
+            - os: darwin
+              arch: ppc64le
+            - os: darwin
+              arch: s390x
+            - os: windows
+              arch: arm
+            - os: windows
+              arch: arm64
+            - os: windows
+              arch: ppc64le
+            - os: windows
+              arch: s390x
+    runs-on: ubuntu-latest
+    env:
+      GO_VERSION: "1.23"
+
+    steps:
+      - name: Install Go
+        if: success()
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Run tests
+        run: GOOS=${{ matrix.os }} GOARCH=${{ matrix.arch }} GOARM=${{ matrix.arm }} go test ./...