Revert deletion of github specific files

.gitattributes

@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto

.github/workflows/gradle.yml

@@ -0,0 +1,23 @@
+name: Java CI
+
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up JDK 17
+      uses: actions/setup-java@v1
+      with:
+        java-version: 17
+    - name: Change wrapper permissions
+      run: chmod +x ./gradlew
+    - name: Build with Gradle
+      run: ./gradlew build