Add yml file to run script on github.

.github/workflows/run.yml

@@ -0,0 +1,19 @@
+name: run
+
+on: workflow_dispatch
+
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.9'
+
+      - name: Print piano pieces in lists
+        run:
+          python 'main.py'