Normalize Gif/Url capitalization in docs
Standardize capitalization of the types 'Gif' and 'Url' across the wiki docs for consistency. Updated headings, prose, links, and image alt text in: Engine-Vexana.md, Engine-VlcPlayer.md, Engine-Xavier.md, FAQ.md, Home.md, Type-Gif.md, Type-Url.md, and Wallpaper-Types.md. No behavioral changes — documentation-only formatting edits.
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>
Fix image paths and preview filename casing
Update documentation image references to use the repository's .images folder (e.g. .images/Gif.gif, .images/Url.gif, .images/Video.gif, etc.) and correct the Home preview link to .images/Preview.png (case change). Remove the deleted .images/preview.png asset. These changes normalize image paths used across Home.md, README.md, Type-*.md, and Using-Store.md so previews point at the repo's .images assets instead of ../.screenshots paths.
Add preview image and fix Home.md image path
Add .images/preview.png to repository and update Home.md to use the new local image path (changed from ../.screenshots/Preview.png to .images/preview.png). This ensures the preview displays correctly from the repo and uses a consistent images folder.