Refactor module call and function call in SC

[Neylix]

Description

Refactor some code in SC to be more understandable and error free

Updated Library module, created new FunctionKeys module

Fixes #1208

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules