github: add buck2 ci build

Signed-off-by: Austin Seipp <[email protected]>

.github/workflows/build-buck2.yml

@@ -0,0 +1,30 @@
+name: buck2
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions: read-all
+
+jobs:
+  nix:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 15 # NOTE (aseipp): keep in-sync with the build.yml timeout limit
+
+    name: build with buck2
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
+      - uses: sigoden/install-binary@3a369a4f1787bc51dc3b5b8f6055920fef1d2eca
+        with:
+          repo: facebook/dotslash
+          name: dotslash
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@1482605bfc5719782e1267fd0c0cc350fe7646b8
+        with:
+          toolchain: 1.76