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/services/MaterialThemeLoader.qml

@@ -0,0 +1,58 @@
+pragma Singleton
+pragma ComponentBehavior: Bound
+
+import qs.modules.common
+import QtQuick
+import Quickshell
+import Quickshell.Io
+
+/**
+ * Automatically reloads generated material colors.
+ * It is necessary to run reapplyTheme() on startup because Singletons are lazily loaded.
+ */
+Singleton {
+    id: root
+    property string filePath: Directories.generatedMaterialThemePath
+
+    function reapplyTheme() {
+        themeFileView.reload()
+    }
+
+    function applyColors(fileContent) {
+        const json = JSON.parse(fileContent)
+        for (const key in json) {
+            if (json.hasOwnProperty(key)) {
+                // Convert snake_case to CamelCase
+                const camelCaseKey = key.replace(/_([a-z])/g, (g) => g[1].toUpperCase())
+                const m3Key = `m3${camelCaseKey}`
+                Appearance.m3colors[m3Key] = json[key]
+            }
+        }
+        
+        Appearance.m3colors.darkmode = (Appearance.m3colors.m3background.hslLightness < 0.5)
+    }
+
+    Timer {
+        id: delayedFileRead
+        interval: Config.options?.hacks?.arbitraryRaceConditionDelay ?? 100
+        repeat: false
+        running: false
+        onTriggered: {
+            root.applyColors(themeFileView.text())
+        }
+    }
+
+	FileView { 
+        id: themeFileView
+        path: Qt.resolvedUrl(root.filePath)
+        watchChanges: true
+        onFileChanged: {
+            this.reload()
+            delayedFileRead.start()
+        }
+        onLoadedChanged: {
+            const fileContent = themeFileView.text()
+            root.applyColors(fileContent)
+        }
+    }
+}