build: Add a build workflow

Author: metabrixkt

.editorconfig

@@ -105,3 +105,6 @@ ij_properties_align_group_field_declarations = false
 ij_properties_keep_blank_lines = false
 ij_properties_key_value_delimiter = equals
 ij_properties_spaces_around_key_value_delimiter = false
+
+[{*.yml,*.yaml}]
+indent_size = 2

.github/workflows/build.yml

@@ -0,0 +1,36 @@
+name: Build and test
+
+on:
+  push:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Java 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Build and test with Gradle
+        run: ./gradlew build --no-daemon --console=plain --stacktrace
+
+      - name: Upload JAR artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-jars
+          path: build/libs/*.jar

build.gradle.kts

@@ -0,0 +1,12 @@
+plugins {
+    base
+}
+
+val copyArtifactsTask = tasks.register<Copy>("copyArtifacts") {
+    from(subprojects.flatMap { it.tasks.withType<Jar>() })
+    into(layout.buildDirectory.dir("libs"))
+}
+
+tasks.assemble {
+    dependsOn(copyArtifactsTask)
+}