dsh-sticky-notes-wall: Bring a sticky notes wall and pinned floating windows to the DSH sidebar

The Sticky Notes Wall plugin for DSH Web/Desktop, maintained by skyline66, is categorized as a client plugin in the community directory with 0 stars, version 1.2.1, and an MIT license. It provides a sidebar entry, a sticky note wall, support for images and text, expiry reminders, completion status, keyboard shortcuts, a pinned floating window, and appearance skins. Additionally, it offers an optional native Windows pinned desktop window. The installation command is `dsh plugin --profile web add github:skyline66/dsh-sticky-notes-wall`. Data is written to `~/.dsh/sticky-notes/` by default, and configuration is centralized in Settings → Sticky Notes. The plugin runs with the permissions of the current DSH process. Before installation, users should review the source code and license; note that the WebView2 SDK binaries belong to Microsoft and are distributed under its accompanying license.