Add environment configuration stage (#358)

Author: shssf

.github/workflows/build-sphinx.yml

@@ -41,6 +41,8 @@ jobs:
           python-version: 3.x
       - name: Install dependencies
         run: pip install numpy cython sphinx sphinx_rtd_theme
+      - name: set Intel OneAPI environment
+        run: . /opt/intel/oneapi/setvars.sh
       - name: Build library
         run: ./0.build.sh
       - name: Build docs