Add Github CI build matrix

.github/workflows/ci.yaml

@@ -0,0 +1,28 @@
+name: build
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types:
+      - opened
+      - synchronize
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        ghc: ['9.0.2']
+        cabal: ['3.6']
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+    name: Haskell GHC ${{ matrix.ghc }} ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup Haskell
+        uses: haskell/actions/setup@v2
+        with:
+          ghc-version: ${{ matrix.ghc }}
+          cabal-version: ${{ matrix.cabal }}
+      - run: |
+          cabal test