Inconsistent function naming

[adityakiran1423]

Find all references to functions named in pascalCase and change it to snake_case. The .github/workflows/pep8_autoformat.yml has been set up however these files with inconsistent naming may have been committed before pep8 auto format job was set up.

Acceptance criteria :

• All functions must have be named using snake_case

Ideas :

• Check all files files in tests/ and src/acom_music_box/