Migrate to unified build script

.github/scripts/test-no-error-reports.sh

@@ -0,0 +1,27 @@
+if [[ -d "run/crash-reports" ]]; then
+  echo "Crash reports detected:"
+  cat $directory/*
+  exit 1
+fi
+
+if grep --quiet "Fatal errors were detected" server.log; then
+  echo "Fatal errors detected:"
+  cat server.log
+  exit 1
+fi
+
+if grep --quiet "The state engine was in incorrect state ERRORED and forced into state SERVER_STOPPED" server.log; then
+  echo "Server force stopped:"
+  cat server.log
+  exit 1
+fi
+
+if grep --quiet 'Done .+ For help, type "help" or "?"' server.log; then
+  echo "Server didn't finish startup:"
+  cat server.log
+  exit 1
+fi
+
+echo "No crash reports detected"
+exit 0
+

.github/workflows/build-and-test.yml

@@ -0,0 +1,45 @@
+# This workflow will build a Java project with Gradle and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
+
+name: Build and test
+
+on:
+  pull_request:
+    branches: [ master, main ]
+  push:
+    branches: [ master, main ]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with: 
+        fetch-depth: 0
+    
+    - name: Set up JDK 8
+      uses: actions/setup-java@v2
+      with:
+        java-version: '8'
+        distribution: 'adopt'
+        cache: gradle
+        
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+
+    - name: Setup the workspace
+      run: ./gradlew setupCIWorkspace
+
+    - name: Build the mod
+      run: ./gradlew build
+
+    - name: Run server for 1.5 minutes
+      run: |
+        mkdir run
+        echo "eula=true" > run/eula.txt  
+        timeout 90 ./gradlew runServer | tee --append server.log || true
+
+    - name: Test no errors reported during server run
+      run: |
+        chmod +x .github/scripts/test-no-error-reports.sh
+        .github/scripts/test-no-error-reports.sh

.github/workflows/release-tags.yml

@@ -0,0 +1,61 @@
+# This workflow will build a Java project with Gradle and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
+
+name: Release tagged build
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set release version
+        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+
+      - name: Set up JDK 8
+        uses: actions/setup-java@v2
+        with:
+          java-version: '8'
+          distribution: 'adopt'
+          cache: gradle
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Setup the workspace
+        run: ./gradlew setupCIWorkspace
+
+      - name: Build the mod
+        run: ./gradlew build
+
+      - name: Release under current tag
+        uses: "marvinpinto/action-automatic-releases@latest"
+        with:
+          repo_token: "${{ secrets.GITHUB_TOKEN }}"
+          automatic_release_tag: "${{ env.RELEASE_VERSION }}"
+          prerelease: false
+          title: "${{ env.RELEASE_VERSION }}"
+          files: build/libs/*.jar
+
+      - name: Set repository owner and name
+        run: |
+          echo "REPOSITORY_OWNER=${GITHUB_REPOSITORY%/*}" >> $GITHUB_ENV
+          echo "REPOSITORY_NAME=${GITHUB_REPOSITORY#*/}" >> $GITHUB_ENV
+
+      - name: Publish package
+        run: ./gradlew publish
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ARTIFACT_GROUP_ID: com.github.${{ env.REPOSITORY_OWNER }}
+          ARTIFACT_ID: "${{ env.REPOSITORY_NAME }}"
+          ARTIFACT_VERSION: "${{ env.RELEASE_VERSION }}"
+          REPOSITORY_NAME: "${{ env.REPOSITORY_NAME }}"
+          REPOSITORY_OWNER: "${{ env.REPOSITORY_OWNER }}"
+