Add Cross-Workspace Window Search v0.1.0

cinnamon-crossworkspace-window-search@ron-ronzz-org.github.com/README.md

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+# Cross-Workspace Window Search
+
+Full-screen global window search across all workspaces for Cinnamon Desktop.
+
+Press `<Super>+<Ctrl>+<Alt>+Up` → type to filter → press Enter to jump. Never lose a window across your workspaces again.
+
+![Screenshot](screenshot.png)
+
+## Features
+
+- **Search all windows** across every workspace in real-time
+- **Filter by title or application** — substring match, case-insensitive
+- **Keyboard-driven** — arrow keys navigate, Enter opens, Escape closes
+- **Full-screen overlay** — plenty of room for results, stays out of your way when dismissed
+- **Workspace badges** — see at a glance which workspace each window belongs to
+- **Zero panel clutter** — no dock icon, no applet. Invoked only on demand
+
+## Requirements
+
+- **Cinnamon Desktop** 5.x or later (Linux Mint 21.x / 22.x)
+- Linux Mint 22.1 (Cinnamon 6.4) recommended
+
+## Installation
+
+Install via **System Settings → Extensions → Download tab**. Search for "Cross-Workspace Window Search" and install.
+
+Or manually:
+
+```bash
+# Clone
+git clone https://github.com/Ron-RONZZ-org/cinnamon-crossworkspace-window-search.git
+
+# Symlink into Cinnamon's extensions folder
+ln -sf "$(pwd)/cinnamon-crossworkspace-window-search@ron-ronzz-org.github.com/files/cinnamon-crossworkspace-window-search@ron-ronzz-org.github.com" \
+  ~/.local/share/cinnamon/extensions/cinnamon-crossworkspace-window-search@ron-ronzz-org.github.com
+
+# Enable in System Settings → Extensions → Cross-Workspace Window Search
+```
+
+## Usage
+
+| Key | Action |
+|-----|--------|
+| `<Super>+<Ctrl>+<Alt>+Up` | Open search overlay |
+| Type anything | Filter windows by title or app class |
+| `↑` / `↓` | Navigate through results |
+| `PgUp` / `PgDn` | Page through results |
+| `Home` / `End` | Jump to first / last result |
+| `Enter` | Switch to selected window |
+| `Escape` | Close search overlay |
+
+## How it works
+
+The extension hooks into Cinnamon's window manager APIs (`Meta.Display`, `Meta.WorkspaceManager`) and Cinnamon's app tracker (`Cinnamon.WindowTracker`) to enumerate all open windows, fetch their icons and titles, and present them in a searchable full-screen overlay — all without any panel widgets or permanent UI.
+
+## License
+
+AGPL-3.0 — see [LICENSE](files/cinnamon-crossworkspace-window-search@ron-ronzz-org.github.com/LICENSE).