Initial build: WishNinja self-hosted gift wishlist manager

ASP.NET Core Blazor (.NET 10) + EF Core/SQLite + Identity. Features:
- Wishlists & items with local image storage (upload, clipboard paste,
  or URL fetched and stored locally)
- Owner-hidden claims (enforced at the query layer) to preserve surprises
- Admin-invite-only onboarding with email-based password resets
- All state under /data; ships as a single Docker image

Includes Dockerfile, docker-compose, Gitea Actions CI (test + push image),
Unraid template, and xUnit tests (claim privacy, invite lifecycle, image validation).

Co-Authored-By: Claude Opus 4.8 <[email protected]>

.gitattributes

@@ -0,0 +1,13 @@
+# Normalize line endings: store text as LF in the repo so the Linux Docker build
+# and Gitea CI runners get consistent files regardless of who commits from Windows.
+* text=auto eol=lf
+
+# Treat common binary assets as binary (never normalized).
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.webp binary
+*.ico binary
+*.woff binary
+*.woff2 binary