modified: README.md

modified:   docs/desktop-environments/kde.md
renamed:    docs/desktop-environments/xfc4.md -> docs/desktop-environments/xfce4.md
new file:   docs/display-managers/gdm.md
new file:   docs/display-managers/sddm.md
new file:   docs/display-protocols/wayland.md
new file:   docs/display-protocols/x11.md
new file:   docs/window-managers/hyprland.md
new file:   docs/window-managers/kwin.md

docs/window-managers/kwin.md

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+# KWin
+
+KWin is the default window manager and Wayland compositor for the KDE Plasma desktop environment. It controls how windows are drawn, moved, decorated, and interacted with.
+
+**🪟 Core Role:**
+
+- **Window Manager for X11:** Manages window placement, decorations (titlebars, borders), and behavior under the X Window System.
+- **Wayland Compositor:** Acts as both display server and window manager under Wayland, handling input, rendering, and session control.
+
+**🧩 Key Features:**
+
+- **Compositing effects:** Supports 3D transitions, transparency, shadows, and animations.
+- **Virtual desktops:** Lets users organize windows across multiple workspaces.
+- **Tiling and snapping:** Offers advanced window placement options.
+- **cripting support:** Configurable via QML and QtScript for custom behavior.
+- **Themeable:** Window decorations and effects can be customized with Aurorae themes or native styles.
+
+**🛠️ Technical Details:**
+
+- Written in C++ using Qt
+- Part of KDE Plasma, but can run standalone or with other desktop environments
+ Cross-platform: Works on Linux, BSD, and other Unix-like systems
+ Open source: Licensed under the GNU General Public License