refactor: organize files

[jaypaik]

• Move libraries under libraries/, separate from helpers/
• Move test files accordingly
• Move modules under folders within their respective categories

[octane-security-app]

Summary by Octane

New Contracts

No new contracts were added in this PR.

Updated Contracts

• DeployAllowlistModule.s.sol: The smart contract updated the import path for AllowlistModule to a new directory structure.
• AccountFactory.sol: Updated import path for ValidationConfigLib from helpers to libraries.
• ModularAccountView.sol: The smart contract revision primarily involves relocating HookConfigLib from the "helpers" directory to the "libraries" directory.
• ModuleManagerInternals.sol: The updates involve shifting several library imports to a new "libraries" directory and updating function calls accordingly.
• ReferenceModularAccount.sol: The smart contract imports are reorganized, moving several helper libraries to a new 'libraries' directory.
• SemiModularAccount.sol: The smart contract update involves moving ModuleEntityLib from a helpers directory to a libraries directory.

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🔗 Commit Hash: 5b69346