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>

.gitignore

@@ -0,0 +1,36 @@
+# Xcode
+build/
+DerivedData/
+*.xcodeproj/xcuserdata/
+*.xcworkspace/xcuserdata/
+*.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
+xcuserdata/
+
+# Swift Package Manager
+.build/
+.swiftpm/
+Packages/
+
+# macOS
+.DS_Store
+*.swp
+*~
+
+# CocoaPods
+Pods/
+
+# Secrets / env
+.env
+*.p12
+*.mobileprovision
+
+# Archives
+*.xcarchive
+
+# Claude
+.claude/
+
+# Reference/research docs (not part of the app)
+screens/
+conjugato/
+conjuu-es/