Initial commit: add .gitignore for .NET + Vue stack

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,48 @@
+# ========================
+# .NET
+# ========================
+bin/
+obj/
+*.user
+*.suo
+.vs/
+*.log
+*.DS_Store
+appsettings.Development.json
+appsettings.Local.json
+
+# NuGet
+*.nupkg
+.nuget/
+
+# Publish output
+publish/
+out/
+
+# ========================
+# Vue / Node
+# ========================
+node_modules/
+dist/
+.env
+.env.local
+.env.*.local
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.vite/
+.cache/
+
+# ========================
+# Rider / VS Code / VS
+# ========================
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# ========================
+# OS
+# ========================
+Thumbs.db
+.DS_Store