feat: add meeting privacy mode for external display - #378

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v3, actions/setup-go@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Include file: <QPainter> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <QImage> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <kwinglutils.h> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: <kwineffects.h> not found. Please note: Cppcheck does not need standard library headers to get proper results.

Include file: "main.h" not found.

Include file: "core/output.h" not found.

Include file: "workspace.h" not found.

Include file: "effects.h" not found.

There is an unknown macro here somewhere. Configuration is required. If KWIN_EFFECT_FACTORY_SUPPORTED is a macro then please configure it.