Add multiplatform CI configuration

.github/build.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/main/ci-build.sh
+sh ci-build.sh

.github/setup.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/main/ci-setup-github-actions.sh
+sh ci-setup-github-actions.sh
+
+# Let the Linux build handle artifact deployment.
+if [ "$(uname)" != Linux ]
+then
+  echo "No deploy -- non-Linux build"
+  echo "NO_DEPLOY=1" >> $GITHUB_ENV
+fi

.github/workflows/build.yml

@@ -0,0 +1,54 @@
+name: build
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+    tags:
+      - "*-[0-9]+.*"
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Java
+        uses: actions/setup-java@v4
+        with:
+          java-version: '8'
+          distribution: 'zulu'
+          cache: 'maven'
+
+      - name: Cache Appose environments
+        id: cache-appose
+        uses: actions/cache@v4
+        with:
+          path: ~/.local/share/appose
+          key: ${{ runner.os }}-build-appose-${{ hashFiles('*') }}
+          restore-keys: |
+            ${{ runner.os }}-build-appose-
+
+      - name: Set up CI environment
+        run: .github/setup.sh
+        shell: bash
+
+      - name: Execute the build
+        run: .github/build.sh
+        shell: bash
+        env:
+          GPG_KEY_NAME: ${{ secrets.GPG_KEY_NAME }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
+          MAVEN_USER: ${{ secrets.MAVEN_USER }}
+          MAVEN_PASS: ${{ secrets.MAVEN_PASS }}
+          OSSRH_PASS: ${{ secrets.OSSRH_PASS }}
+          SIGNING_ASC: ${{ secrets.SIGNING_ASC }}