Add README and workflow file

Author: ShotaAk

.github/workflows/ci.yaml

@@ -0,0 +1,22 @@
+name: CI
+
+on:
+  push:
+    paths-ignore:
+    - '**.md'
+  pull_request:
+    paths-ignore:
+    - '**.md'
+  workflow_dispatch:
+
+jobos:
+  compile-sketches:
+  runs-on: ubuntu-latest
+  steps:
+    - uses: actions/checkout@v3
+    - uses: arduino/compile-sketches@v1
+      with:
+        # 要修正
+        fqbn: arduino:avr:uno
+        sketch-paths: |
+          - uROS_STEP1_LED

README.md

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+# micro-ROS examples for Pi:Co Classic 3
+