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/ApiStrategy.qml

@@ -0,0 +1,10 @@
+import QtQuick
+
+QtObject {
+    function buildEndpoint(model: AiModel): string { throw new Error("Not implemented") }
+    function buildRequestData(model: AiModel, messages, systemPrompt: string, temperature: real, tools: list<var>) { throw new Error("Not implemented") }
+    function buildAuthorizationHeader(apiKeyEnvVarName: string): string { throw new Error("Not implemented") }
+    function parseResponseLine(line: string, message: AiMessageData) { throw new Error("Not implemented") }
+    function onRequestFinished(message: AiMessageData): var { return {} } // Default: no special handling
+    function reset() { } // Reset any internal state if needed
+}