remove winlibs and use vcpkg instead

[xiaoyifang]

Is your feature request related to a problem? Please describe.
Currently the packages in winlibs are mostly taken from vcpkg build packages.

Describe the solution you'd like

use vcpkg and qmake /cmake together .
Maybe need change the github action script at the same time.

Steps:

• create a seperate repository to backup the winlibs https://github.com/xiaoyifang/goldendict-winlibs

• remove eb.lib from winlibs and use submodule eb

• use cmake to build qt6 based goldendict

• integrete vcpkg with cmake
  vcpkg has better support for cmake

• new features will stop to add to qt5 if it cost extra work.

[xiaoyifang]

this can be postpone after cmake adaption which is qt6.

[xiaoyifang]

vcpkg and cmake can be used together ,
Currently ,all the dependencies in the winlibs folder can be found in the vcpkg

[shenlebantongying]

ffmpeg needs hours to build 😅 😅

vcpkg has a experimental GitHub caches feature that uses GitHub caches. Maybe this feature does not work for now. We can also make a new workflow that dedicates to building a cache for all dependencies and drop them into the current winlibs. Personal free GitHub has 10 GiB space for caches.

https://learn.microsoft.com/en-us/vcpkg/consume/binary-caching-github-actions-cache

https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows

Or we simply drop ffmpeg now.

[xiaoyifang]

ffmpeg needs hours to build 😅 😅

ffmpeg does not needed anymore when qt>6.5(?). or do not build with ffmpeg enabled on Windows

[shenlebantongying]

TODO for future PRs

• add breakpad for windows
• how to disable building of debug packages for CI?
• Pin version? Remove some unused features?

[shenlebantongying]

To make breakpad optional, combine these:

• https://learn.microsoft.com/en-us/vcpkg/concepts/manifest-mode#example-features-in-project-manifests
• https://learn.microsoft.com/en-us/vcpkg/users/buildsystems/cmake-integration#vcpkg_manifest_features

[shenlebantongying]

The vcpkg bundled in GitHub actions runners update every time the runner image updates.

This means vcpkg packages will be updated weekly.

Update frequency -> https://github.com/search?q=repo%3Aactions%2Frunner-images+Windows+Server+2022&type=pullrequests

The initial full build needs maybe 30 mins. https://github.com/shenlebantongying/goldendict-ng/actions/runs/9824674216/job/27123911938 .

I suppose that even if the vcpkg updates, the old caches are still useable if the library isn't updated?

Worst case scenario: one super long build to create caches every week 😅

[shenlebantongying]

I consider this is finished. Let's just keep the winlibs just for now, just for PR check.