Add multiarch support

.github/workflows/ci.yaml

@@ -5,7 +5,6 @@ on:
     branches: [ "master" ]
   pull_request:
     branches: [ "master" ]
-
   workflow_dispatch:
 
 concurrency:
@@ -20,12 +19,38 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os:
-          - ubuntu-latest
-          - macos-latest
-          - windows-latest
-    name: Build and Test 🔬 - ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
+        include:
+            # Linux x64 (default)
+            - name: ubuntu-x64
+              runs-on: ubuntu-latest
+              arch: x64
+
+            # Linux arm64 - use GitHub hosted ARM runner (native) when available
+            - name: ubuntu-arm64
+              runs-on: ubuntu-24.04-arm
+              arch: arm64
+
+            # macOS x64 (if you still need Intel macOS, check availability)
+            - name: macos-x64
+              runs-on: macos-latest
+              arch: x64
+
+            # macOS arm64 (Apple Silicon)
+            - name: macos-arm64
+              runs-on: macos-latest
+              arch: arm64
+
+            # Windows x64
+            - name: windows-x64
+              runs-on: windows-latest
+              arch: x64
+
+            # Windows arm64: only if you manage a self-hosted runner or know it's available.
+            # - name: windows-arm64
+            #   runs-on: windows-2022-arm    # example — likely self-hosted / not available by default
+            #   arch: arm64
+    name: Build and Test - ${{ matrix.name}}
+    runs-on: ${{ matrix.runs-on }}
 
     steps:
       - name: Checkout repository
@@ -37,8 +62,12 @@ jobs:
           toolchain: ${{ env.RUST_VERSION }}
           override: true
 
+      - name: Prepare for arch-specific build
+        run: |
+          echo "ARCH=${{ matrix.arch }} RUNS_ON=${{ matrix.runs-on }}"
+
       - name: Build
         run: cargo build
 
       - name: Run tests
-        run: cargo test
+        run: cargo test