Introduced GitHub Actions initial workflow (#28)

It runs on the latest ubuntu, installl gcc and runs ./build.sh
It was generated using GitHub Copilot

Author: silabs-ThibautC

.github/workflows/actions.yml

@@ -0,0 +1,17 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Install GCC
+      run: sudo apt-get install -y gcc
+
+    - name: Build
+      run: ./build.sh