feat: add GitHub Actions workflow

.github/workflows/rust.yml

@@ -0,0 +1,28 @@
+name: Rust
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  rocket_oauth2:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build
+      run: cargo build --workspace
+    - name: Run tests
+      run: cargo test --workspace
+  rocket_tls_compat_check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build
+      run: cd rocket_tls_compat_check && cargo build --workspace
+    - name: Run tests
+      run: cd rocket_tls_compat_check && cargo test --workspace