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/common/widgets/KeyboardKey.qml

@@ -0,0 +1,42 @@
+import qs.modules.common
+import QtQuick
+
+Rectangle {
+    id: root
+    property string key
+
+    property real horizontalPadding: 6
+    property real verticalPadding: 1
+    property real borderWidth: 1
+    property real extraBottomBorderWidth: 2
+    property color borderColor: Appearance.colors.colOnLayer0
+    property real borderRadius: 5
+    property color keyColor: Appearance.m3colors.m3surfaceContainerLow
+    implicitWidth: keyFace.implicitWidth + borderWidth * 2
+    implicitHeight: keyFace.implicitHeight + borderWidth * 2 + extraBottomBorderWidth
+    radius: borderRadius
+    color: borderColor
+
+    Rectangle {
+        id: keyFace
+        anchors {
+            fill: parent
+            topMargin: borderWidth
+            leftMargin: borderWidth
+            rightMargin: borderWidth
+            bottomMargin: extraBottomBorderWidth + borderWidth
+        }
+        implicitWidth: keyText.implicitWidth + horizontalPadding * 2
+        implicitHeight: keyText.implicitHeight + verticalPadding * 2
+        color: keyColor
+        radius: borderRadius - borderWidth
+
+        StyledText {
+            id: keyText
+            anchors.centerIn: parent
+            font.family: Appearance.font.family.monospace
+            font.pixelSize: Appearance.font.pixelSize.smaller
+            text: key
+        }
+    }
+}