Add multi-Python version testing to build-and-test workflow

- Test against Python 3.8, 3.9, 3.10, 3.11, 3.12, 3.13
- Ensures compatibility across supported Python versions
- Improves test coverage and catches version-specific issues

Author: sunnywu

.github/workflows/build-and-test.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8"]
+        python-version: ["3.8","3.9","3.10","3.11","3.12","3.13"]
 
     steps:
     - uses: actions/checkout@v4