Add VlcPlayer engine and update docs/enums
Introduce the new VlcPlayer live engine: add Engine-VlcPlayer.md and wire VlcPlayer into documentation, enums, settings, caches, logs, publish pipeline, preprocessor symbols, properties, and runtime-dependency pages. Update references/counts from seven→eight engines, include VlcPlayer in EngineType/PropertiesType lists, allowed-engine matrices (Gif/Video), cache and AppData paths, customization/property-panel docs, and publish scripts/docs to include the new project. Documentation clarifies libVLC is bundled (no runtime prompt) and notes hardware-acceleration behavior and GIF handling. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Add wallpaper Customize screenshots and update checklist
Add new screenshot assets and embed them into documentation. Added .images/* PNGs and replaced multiple "Screenshot needed" placeholders with actual images in Customizing-Wallpaper.md, Property-Service.md, Type-Gif.md, Type-Url.md, Type-Video.md, and Type-YouTube.md. Updated README.md screenshot checklist counts and noted which screenshots were added. This brings multiple Customize / Property editor and wallpaper-type images into the wiki and updates the checklist to reflect the additions.