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/ContentPage.qml

@@ -0,0 +1,29 @@
+import QtQuick
+import QtQuick.Layouts
+import qs.modules.common
+import qs.modules.common.widgets
+
+StyledFlickable {
+    id: root
+    property real baseWidth: 550
+    property bool forceWidth: false
+    property real bottomContentPadding: 100
+
+    default property alias data: contentColumn.data
+
+    clip: true
+    contentHeight: contentColumn.implicitHeight + root.bottomContentPadding // Add some padding at the bottom
+    implicitWidth: contentColumn.implicitWidth
+    
+    ColumnLayout {
+        id: contentColumn
+        width: root.forceWidth ? root.baseWidth : Math.max(root.baseWidth, implicitWidth)
+        anchors {
+            top: parent.top
+            horizontalCenter: parent.horizontalCenter
+            margins: 10
+        }
+        spacing: 20
+    }
+
+}