Add workflow for publishing package

.github/workflows/publish.yml

@@ -0,0 +1,28 @@
+name: Publish package
+
+on:
+  push:
+    tags:
+      - '**'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 8
+        uses: actions/setup-java@v3
+        with:
+          java-version: 8
+          distribution: 'corretto'
+
+      - name: Grant Permissions to gradlew
+        run: chmod +x gradlew
+
+      - name: Run Gradle publish
+        run: ./gradlew publish
+        env:
+          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
+          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}

build.gradle

@@ -1,5 +1,6 @@
 plugins {
     id 'java'
+    id 'maven-publish'
 }
 
 group = 'space.provided'
@@ -17,3 +18,21 @@ dependencies {
 test {
     useJUnitPlatform()
 }
+
+publishing {
+    publications {
+        maven(MavenPublication) {
+            from components.java
+        }
+    }
+
+    repositories {
+        maven {
+            url = 'https://registry.provided.space'
+            credentials {
+                username = System.getenv('REGISTRY_USERNAME')
+                password = System.getenv('REGISTRY_PASSWORD')
+            }
+        }
+    }
+}