add workflow for docs

Author: Cydhra

.github/workflows/rust.yml

@@ -31,4 +31,14 @@ jobs:
       - name: Build
         run: cargo build --verbose --features serde
       - name: Run tests
-        run: cargo test --verbose --features serde
+        run: cargo test --verbose --features serde
+
+  docs:
+    runs-on: ubuntu-latest
+    env:
+      RUSTFLAGS: -C target-cpu=x86-64
+      RUSTDOCFLAGS: -C target-cpu=x86-64
+    steps:
+      - uses: actions/checkout@v4
+      - name: Docs
+        run: cargo doc --verbose --all-features