Initial commit: Conjuga Spanish conjugation app

Includes SwiftData dual-store architecture (local reference + CloudKit user data),
JSON-based data seeding, 20 tense guides, 20 grammar notes, SRS review system,
course vocabulary, and widget support.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Conjuga/Scripts/build_store.swift

@@ -0,0 +1,14 @@
+#!/usr/bin/env swift
+
+// Run this script to generate a pre-built SwiftData store (default.store)
+// that ships with the app bundle. No first-launch seeding needed.
+
+import Foundation
+import SwiftData
+
+// We can't easily run this as a standalone script because it needs
+// the @Model types compiled. Instead, we'll build it as part of the app.
+// See DataLoader.buildPreloadedStore() below.
+
+print("Use DataLoader.buildPreloadedStore() from within the app to generate the store.")
+print("Then copy the .store file to the bundle.")