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>
Add Mermaid diagrams and update README
Embed native Mermaid diagrams into multiple wiki pages to replace diagram placeholders (Architecture, engines, create, publish pipeline, installer, settings persistence, repo layout, types, etc.). Update README publishing instructions (fix source path, simplify steps) and mark diagrams as done; refresh screenshot checklist to list remaining screenshot placeholders and clarify inline preview behavior. Mostly documentation-only changes improving diagram availability and publishing guidance.