initialize repository

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

.github/workflows/ci.yml

@@ -0,0 +1,15 @@
+name: CI
+on:
+  - push
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup Zig
+        run: |
+          sudo apt install xz-utils
+          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.9.0-dev.347+628f490c5.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
+      - name: engine::test
+        run: cd engine && zig build test