🐛 Fix significant issues highlighted thanks to testing

[DanielRuthardt]

📑 What

Fix significant issues highlighted thanks to testing.

❓ Why

⚡ How to Review

✅ Testing

• I have tested my work
• I need you to test it too

[Copilot]

Pull Request Overview

This PR fixes critical bugs in file permission checking functions discovered through testing. The changes correct the behavior of world permission checks to only examine the specified path rather than recursively searching subdirectories, and fix inverted logic in the accessibility check.

• Added -maxdepth 0 flag to find commands in permission checking functions to prevent unintended recursive directory traversal
• Fixed inverted conditional logic in is_world_accessible function
• Added required include directives for helper functions

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
libs/file/is_world_writable	Added -maxdepth 0 to prevent recursive directory search
libs/file/is_world_readable	Added -maxdepth 0 to prevent recursive directory search
libs/file/is_world_executable	Added -maxdepth 0 to prevent recursive directory search
libs/file/is_world_accessible	Fixed inverted logic and added include directives for dependencies

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