ts: basic documentation for utility scripts

- avoid `@ref`
- align with 4.x branch (minimize merge conflicts)

* imgcodecs: tiff: Reduce memory usage to read 16bit image.

* imgcodecs: tiff: Reduce memory usage to read 8bit images

* imgcodecs: tiff: split basic test and full test.

* imgcodecs: tiff: fix to warning C4244

* imgcodecs: tiff: fix to warning C4244

Add information about the disparity-to-depth mapping matrix. Add more references about other related functions in the calib3d doc.

In some situations the last value was missing from the discrete theta
values. Now, the last value is chosen such that it is close to the
user-provided maximum theta, while the distance to pi remains always
at least theta_step/2. This should avoid duplicate detections.

A better way would probably be to use max_theta as is and adjust the
resolution (theta_step) instead, such that the discretization would
always be uniform (in a circular sense) when full angle range is used.

fix python test_detect_and_decode_multi

fix python test_detect_and_decode_multi, sort QR in multiDetect/multiDecode

enable tests with "version_5_up.jpg", "version_5_top.jpg"

remove lambda

This reverts commit a630ad73.

     * read vector at runtime
     * add enum

fix Rect value of integral image example;

- Add conditional compilation directives to replace deprecated std::random_shuffle with new std::shuffle when C++11 is available.

- Set random seed to a fixed value before shuffling containers to ensure reproducibility.

Resolves opencv/opencv#22209.

DRY
bump the version

Add conditional compilation directives to enable uses of std::chrono on supported compilers. Use std::chrono::steady_clock as a source to retrieve current tick count and clock frequency.

Fixes opencv/opencv#6902.

Add missing code.

* Add missing code.

This was removed in c7fc563d
The resize is also a side-effect.

* Use shorteer cv::Point2f *=

It's not clear how ranges argument should be used in the overload of
calcHist that accepts std::vector. The main overload uses array of
arrays there, while std::vector overload uses a plain array. The code
interprets the vector as a flattened array and rebuilds array of arrays
from it. This is not obvious interpretation, so documentation has been
added to explain the expected usage.

* fix the bug in pyrUp

* add test case for pyrUp

* coding style