chore: add github packages publication

.github/workflows/release-github.yml

@@ -0,0 +1,28 @@
+name: Deploy to github
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+        uses: actions/checkout@v4
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '8'
+
+      - name: Publish to Github Packages
+        id: deploy
+        run: |
+          ./gradlew publish -i -Pgpr.repo=$${{ vars.GHP_REPO }}
+          mvn deploy -Pgithub -DaltDeploymentRepository=releaseRepository::default::$${{ vars.GHP_REPO }}
+        shell: bash
+        env:
+          GHP_USERNAME: ${{ secrets.GHP_USERNAME }}
+          GHP_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

build.gradle.kts

@@ -1,4 +1,19 @@
 allprojects {
     version = "0.2.1"
     group = "io.github.rockcrafters"
+    apply(plugin = "maven-publish")
+    plugins.withType<MavenPublishPlugin>().configureEach {
+        extensions.configure<PublishingExtension>() {
+            repositories {
+                maven {
+                    name = "GitHubPackages"
+                    url = uri(project.findProperty("gpr.repo") ?: "")
+                    credentials {
+                        username = project.findProperty("gpr.user") as String? ?: System.getenv("GHP_USERNAME")
+                        password = project.findProperty("gpr.key") as String? ?: System.getenv("GHP_TOKEN")
+                    }
+                }
+            }
+        }
+    }
 }