[+] Add starter files

Author: hykilpikonna

.github/classroom/autograding.json

@@ -0,0 +1,14 @@
+{
+  "tests": [
+    {
+      "name": "Default Test Runner",
+      "setup": "",
+      "run": "gradle test --tests \"*.*\"",
+      "input": "",
+      "output": "",
+      "comparison": "included",
+      "timeout": 10,
+      "points": 1
+    }
+  ]
+}

.github/workflows/classroom.yml

@@ -0,0 +1,16 @@
+name: GitHub Classroom Workflow
+
+on: [push]
+
+permissions:
+  checks: write
+  actions: read
+  contents: read
+
+jobs:
+  build:
+    name: Autograding
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: education/autograding@v1