ENH: Add indent to image's matrix printing

[blowekamp]

Add Matrix::PrintSelf method which uses ITK's indent object to allow proper indenting of nested objects.

Fixes left aligned matrix values when printing the Image classes.

PR Checklist

• No API changes were made (or the changes have been approved)
• No major design changes were made (or the changes have been approved)
• Added test (or behavior not changed)
• Updated API documentation (or API not changed)
• Added license to new files (if any)
• Added Python wrapping to new files (if any) as described in ITK Software Guide Section 9.5
• Added ITK examples for all new major features (if any)

Refer to the ITK Software Guide for
further development details if necessary.

[blowekamp]

This was the print out style that Copilot made up. I am not sure if a numpy style with [[][][]] would be preferred, or the the generated matrix dimensions are desired. Please suggest/propose.

New printout from Image:

603:   Direction: 
603:   Matrix (2x2)
603:     1 0 
603:     0 1 
603:   IndexToPointMatrix: 
603:     Matrix (2x2)
603:       1 0 
603:       0 1 
603:   PointToIndexMatrix: 
603:     Matrix (2x2)
603:       1 0 
603:       0 1 
603:   Inverse Direction: 
603:     Matrix (2x2)
603:       1 0 
603:       0 1 

Old print out:

  Direction: 
1 0
0 1

  IndexToPointMatrix: 
1 0
0 1

  PointToIndexMatrix: 
1 0
0 1

  Inverse Direction: 
1 0
0 1

And a numpy identity matrix:

[[1. 0. 0.]
 [0. 1. 0.]
 [0. 0. 1.]]

[dzenanz]

I like it this way. I thought about whether to ask for before/after output 😄

[jhlegarreta]

Given the choice, maybe because I got used to it, I like Numpy's better (with the appropriate indentation, but I am fine with the current style improvement.

[blowekamp]

Note: the matrix in AffineTransform is printed correctly with in a CompositeTransform. The Transform classes should be consistent.

[dzenanz]

/azp run ITK.Linux.Python

[dzenanz]

Is this ready to merge? Remove draft status?

[blowekamp]

Let see if @thewtex has a comment about the preferred formatting of the output for the Matrix.

[thewtex]

👍 looks like a good improvement to me. @blowekamp thanks for taking the time to make the tweak.

[dzenanz]

@blowekamp time to merge?