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/ai/AiModel.qml

@@ -0,0 +1,32 @@
+import QtQuick;
+
+/**
+ * An AI model representation.
+ * - name: Friendly name of the model
+ * - icon: Icon name of the model
+ * - description: Description of the model
+ * - endpoint: Endpoint of the model
+ * - model: Model code (like gpt-4.1 or gemini-2.5-flash)
+ * - requires_key: Whether the model requires an API key
+ * - key_id: The identifier of the API key. Use the same identifier for models that can be accessed with the same key.
+ * - key_get_link: Link to get an API key
+ * - key_get_description: Description of pricing and how to get an API key
+ * - api_format: The API format of the model. Can be "openai" or "gemini". Default is "openai".
+ * - extraParams: Extra parameters to be passed to the model. This is a JSON object.
+ */
+
+QtObject {
+    property string name
+    property string icon
+    property string description
+    property string homepage
+    property string endpoint
+    property string model
+    property bool requires_key: true
+    property string key_id
+    property string key_get_link
+    property string key_get_description
+    property string api_format: "openai"
+    property var tools
+    property var extraParams: ({})
+}