Add CI

Author: UniquePython

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: sudo apt-get install -y gcc make
+
+      - name: Build and run tests
+        run: make

README.md

@@ -1,5 +1,7 @@
 # SAF — Simple Audio Format
 
+[![CI](https://github.com/UniquePython/saf/actions/workflows/ci.yml/badge.svg)](https://github.com/UniquePython/saf/actions/workflows/ci.yml)
+
 A minimal, portable, header-only C library for a dead-simple audio format. No magic numbers, no validation overhead, no dependencies. You own the data, you own the responsibility.
 
 ## Philosophy