chore: added pyo3 CI/CD

Including the execution of some simple tests.

.gitlab-ci.yml

@@ -56,6 +56,18 @@ build-wasm:
       - frontends/web/lib
     expire_in: 1 day
 
+build-pyo3:
+  stage: build
+  parallel:
+    matrix:
+      - RUST_VERSION: ["1.74.0"]
+  script:
+    - rustup toolchain install $RUST_VERSION
+    - rustup override set $RUST_VERSION
+    - rustc --version
+    - cargo build --features python
+    - cargo build --release --features python
+
 test-rust:
   stage: test
   parallel: