added renameat2 flags to the rename function

[idi8-t-here]

#121 -> Adding renameat(2) flags to the rename function

Description

Added the RENAME_EXCHANGE and RENAME_NOREPLACE flags and they're respective functions

Fixes # (issue)

Added the RENAME_EXCHANGE and RENAME_NOREPLACE flags and they're respective functions

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

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Checklist:

• I have performed a self-review of my code
• I have tested my code on different platforms (if applicable)
• I have commented my code, particularly in hard-to-understand areas
• I have added necessary documentation (if appropriate)
• 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

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Additional Context

i chose not to implement the RENAME_WHITEOUT flag, as the bat file says its only recommended for overlay/union filesystems