added unit testcase removed not needed files

.gitignore

README.md

__pycache__/__init__.cpython-310.pyc

__pycache__/config.cpython-310.pyc

__pycache__/process_data.cpython-310.pyc

__pycache__/test_process_data.cpython-310-pytest-8.3.5.pyc

coverage.xml

data/evldec17.xlsx

sonar-scanner-cli-6.2.1.4610-linux-x64.zip

tests/test_excel_operation.py

tests/test_process_data.py