introduce new github workflows

Author: okbob

.github/workflows/main.yml

@@ -0,0 +1,22 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        pg: [17, 16, 15, 14, 13, 12]
+    name: 🐘 PostgreSQL ${{ matrix.pg }}
+    runs-on: ubuntu-latest
+    container: pgxn/pgxn-tools
+    steps:
+      - run: pg-start ${{ matrix.pg }}
+      - uses: actions/checkout@v2
+      - run: pg-build-test
+

.github/workflows/release.yml

@@ -0,0 +1,20 @@
+name: Release
+on:
+  push:
+    tags: [v*]
+jobs:
+  release:
+    name: Release on PGXN
+    runs-on: ubuntu-latest
+    container: pgxn/pgxn-tools
+    env:
+      PGXN_USERNAME: ${{ secrets.PGXN_USERNAME }}
+      PGXN_PASSWORD: ${{ secrets.PGXN_PASSWORD }}
+    steps:
+    - name: Check out the repo
+      uses: actions/checkout@v4
+    - name: Bundle the Release
+      id: bundle
+      run: pgxn-bundle
+    - name: Release on PGXN
+      run: pgxn-release