feat: add ci, testing and base structure

.gitea/workflows/ci.yml

@@ -0,0 +1,23 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: install deps
+        run: sudo apt install cmake
+
+      - name: build
+        run: |
+          cmake -B build
+          cmake --build build
+
+      - name: test
+        run: |
+          cd build
+          ctest