Add clang format check (#11)

* add clang format check

* update file names for clang format check

* resolve merge conflict

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Co-authored-by: Jian Sun <sunjian@ucar.edu>

.github/workflows/clang_format.yml

@@ -22,9 +22,7 @@ jobs:
 
       - name: Format code
         run: |
-          find include -type f \( -name '*.hpp' -o -name '*.h' -o -name '*.cuh' -o -name '*.inl' \) -exec clang-format -i --style=file --verbose {} +
-          find src -type f \( -name '*.cu' -o -name '*.hpp' -o -name '*.h' -o -name '*.cpp' \) -exec clang-format -i --style=file --verbose {} +
-          find test -type f \( -name '*.hpp' -o -name '*.h' -o -name '*.cpp' -o -name '*.cuh' -o -name '*.cu' \) ! -path 'test/tutorial/*' -exec clang-format -i --style=file --verbose {} +
+          find src -type f \( -name '*.cc' -o -name '*.hh' -o -name '*.h' -o -name '*.cpp' \) -exec clang-format -i --style=file --verbose {} +
 
       - name: Check for changes
         id: check-changes