* pin opencv version

Co-authored-by: Sugar-Baby <87747602+Sugar-Baby@users.noreply.github.com>
Co-authored-by: AtomAlpaca <66774326+AtomAlpaca@users.noreply.github.com>

* helper function for selecting the optimal coopmat mnk size

* fix crash on nt kernel without GetLogicalProcessorInformationEx

* fix 1d 2d cstep

* fix ranged cstep

* Add lasx optimization for loongarch_usability.h

* Add _LOONGARCH_FLOAT_CONST_PS256 to avoid variable redefinition

* Add lasx optimization for math funtion

* Add lasx optimization for sigmoid

* add lsx optimization for trigonometric functions

* add lasx optimization for trigonometric functions

- synchronize the latest English content to the Chinese documentation
- correct spelling errors in the English version of glsl-extention
- Fix spelling 'enable_validation_layer' in src/gpu.cpp

Bumps [stefanzweifel/git-auto-commit-action](https://github.com/stefanzweifel/git-auto-commit-action) from 5 to 6.
- [Release notes](https://github.com/stefanzweifel/git-auto-commit-action/releases)
- [Changelog](https://github.com/stefanzweifel/git-auto-commit-action/blob/master/CHANGELOG.md)
- [Commits](https://github.com/stefanzweifel/git-auto-commit-action/compare/v5...v6)

---
updated-dependencies:
- dependency-name: stefanzweifel/git-auto-commit-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Use platform-specific APIs for environment variables

The previous patch used `putenv` as a quick fix for Windows compatibility. However, `putenv` is a legacy API and not the recommended choice.

This commit replaces the single `putenv` call with the most appropriate function for each platform:
- On Windows, it now uses the modern and secure `_putenv_s`.
- On Unix-like systems, it uses the standard `setenv`.

---------

Co-authored-by: nihui <shuizhuyuanluo@126.com>

* add int8 definitions
* packing vulkan int8/int32, quantize vulkan
* vulkan dequantize
* requantize vulkan

* fix pyncnn build

* always prefer xtheadvector
* update ci toolchain

vkimagemat was originally used as a mat storage in the hope of improving performance on old adreno gpus, but in fact it is slower than the cpu in most cases and is no longer suitable for the latest adreno architecture and large shapes