[RehanChalana]

Summary by cubic

Refactors the multi-file module example to use the standard module_init and module_exit macros instead of the legacy init_module and cleanup_module entry points.

• start.c and stop.c now define static __init and __exit functions and register them with the appropriate macros.
• Adds linux/init.h include for the macro definitions.

^{Written for commit efa896c. Summary will update on new commits.}

Closes #388

[cubic-dev-ai]

No issues found across 2 files

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