chore(ci): init mage build & test pipeline

.github/workflows/mage-pipeline.yaml

@@ -0,0 +1,77 @@
+name: template-mage-pipeline
+
+## workflow will trigger on below condition,
+## except image release that have jobs condition to trigger only on tagging
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+    tags:
+      - 'v*.*.*'
+
+
+env:
+  GCP_REGISTRY_ARTIFACT_PATH: us-docker.pkg.dev/world-engine-test/dark-forest
+  GCP_PROJECT_ID: world-engine-test
+  CARDINAL_REGISTRY_PATH: dark-forest/cardinal
+  NAKAMA_REGISTRY_PATH: dark-forest/nakama
+
+jobs:
+  mage-build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      matrix:
+        go-version: [1.20.x]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Mage - check
+        uses: magefile/mage-action@v2
+        with:
+          version: latest
+          args: check
+      - name: Mage - build
+        uses: magefile/mage-action@v2
+        with:
+          version: latest
+          args: build
+  mage-test:
+    runs-on: ubuntu-latest
+    needs: mage-build
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      matrix:
+        go-version: [1.20.x]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Mage - check
+        uses: magefile/mage-action@v2
+        with:
+          version: latest
+          args: check
+      - name: Mage - test
+        uses: magefile/mage-action@v2
+        with:
+          version: latest
+          args: test