Add time reverse

[ternaus]

Fixes: #2119

Summary by Sourcery

Add a new 'TimeReverse' transformation for spectrogram images, which reverses the time axis similar to a horizontal flip. Update documentation to reflect this addition and include tests to verify its functionality.

New Features:

• Introduce a new transformation called 'TimeReverse' for spectrogram images, which reverses the time axis, analogous to a horizontal flip in image processing.

Enhancements:

• Update the README to include the new 'TimeReverse' transformation in the list of available spatial-level transforms.

Tests:

• Add test cases for the new 'TimeReverse' transformation to ensure its correct functionality.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR introduces a new TimeReverse transform for spectrogram augmentation, which is implemented as a subclass of HorizontalFlip. The implementation includes necessary test updates and documentation changes. The PR also includes some cleanup in the test_targets.py file by simplifying the DUAL_TARGETS dictionary.

Class diagram for the new TimeReverse transform

classDiagram
    class HorizontalFlip {
        +p: float
        +always_apply: bool | None
    }
    class TimeReverse {
        +p: float
        +always_apply: bool | None
    }
    TimeReverse --|> HorizontalFlip
    note for TimeReverse "TimeReverse is a subclass of HorizontalFlip, providing a semantically meaningful name for spectrograms."

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File-Level Changes

Change	Details	Files
Added new TimeReverse transform for spectrogram augmentation	Created TimeReverse class that inherits from HorizontalFlip Added comprehensive docstring explaining the transform's purpose and usage Implemented initialization with probability and always_apply parameters	albumentations/augmentations/spectrogram/transform.py
Updated tests to include TimeReverse transform	Added TimeReverse to the list of test augmentation definitions Included TimeReverse in transform test cases	tests/aug_definitions.py tests/test_transforms.py
Modified test targets configuration	Simplified DUAL_TARGETS dictionary by removing redundant entries Updated default target set in test_dual function to include all target types	tests/test_targets.py
Updated documentation	Added TimeReverse to the table of spatial-level transforms Marked TimeReverse as supporting image, mask, bboxes, and keypoints targets	README.md

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[sourcery-ai]

Hey @ternaus - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.24%. Comparing base (b1a79c2) to head (e8b0561).
Report is 255 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##           main    #2121       +/-   ##
=========================================
+ Coverage      0   90.24%   +90.24%     
=========================================
  Files         0       47       +47     
  Lines         0     7718     +7718     
=========================================
+ Hits          0     6965     +6965     
- Misses        0      753      +753     

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