While this appears to be a large PR, it's primarily focused on reorganizing the codebase structure to follow modern Rust practices and establish a solid foundation for future development.

Key changes:

• Moved libcorn to the top level directory
• Relocated CLI to dedicated cli folder (no extra lib.rs needed)
• Updated tests and CI configuration to work with the new structure
• Added release profile with proper optimizations
• Updated bench configurations to require appropriate features
• Refined feature declarations to use proper dependency syntax
• Cleaned up and formatted files

Note: It'd recommend to pull this PR locally for review as GitHub's diff view may not clearly represent the structural changes.

Depends on #39