Make flake self-contained - consolidate installer-replication

BREAKING CHANGE: Remove external dots-hyprland dependency

- Imported all essential configs from dots-hyprland/installer-replication
- Added complete configs/ directory with:
  - hypr/ - Hyprland configuration
  - quickshell/ - Quickshell widgets and config
  - applications/ - Application configurations
  - scripts/ - Utility scripts
  - matugen/ - Material You theming
- Updated flake.nix to use local ./configs instead of external repo
- Simplified update-flake script (removed external repo management)
- Updated README to reflect self-contained architecture
- All builds pass with local configurations

Benefits:
- No external repository dependencies
- Faster builds (no network dependencies)
- Version controlled configs in single repo
- Easier maintenance and development
- Complete installer replication in one place

configs/quickshell/modules/sidebarRight/quickToggles/GameMode.qml

@@ -0,0 +1,31 @@
+import qs.modules.common
+import qs.modules.common.widgets
+import qs
+import Quickshell
+import Quickshell.Io
+
+QuickToggleButton {
+    id: root
+    buttonIcon: "gamepad"
+    toggled: toggled
+
+    onClicked: {
+        root.toggled = !root.toggled
+        if (root.toggled) {
+            Quickshell.execDetached(["bash", "-c", `hyprctl --batch "keyword animations:enabled 0; keyword decoration:shadow:enabled 0; keyword decoration:blur:enabled 0; keyword general:gaps_in 0; keyword general:gaps_out 0; keyword general:border_size 1; keyword decoration:rounding 0; keyword general:allow_tearing 1"`])
+        } else {
+            Quickshell.execDetached(["hyprctl", "reload"])
+        }
+    }
+    Process {
+        id: fetchActiveState
+        running: true
+        command: ["bash", "-c", `test "$(hyprctl getoption animations:enabled -j | jq ".int")" -ne 0`]
+        onExited: (exitCode, exitStatus) => {
+            root.toggled = exitCode !== 0 // Inverted because enabled = nonzero exit
+        }
+    }
+    StyledToolTip {
+        content: Translation.tr("Game mode")
+    }
+}