add CI build

.github/workflows/ci-build.yml

@@ -0,0 +1,20 @@
+name: CI Build
+on: 
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+jobs:
+  linux:
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Install Dependencies
+      run: |
+        sudo apt update
+        sudo apt install -y cmake g++ libogre-1.12-dev
+    - uses: actions/checkout@v2
+    - name: Test
+      run: |
+        mkdir build && cd build
+        cmake -DCAELUM_BUILD_SAMPLES=ON -DCAELUM_SCRIPT_SUPPORT=ON ..
+        cmake --build . -- -j 2