Initialize CMS application scaffold

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.gitignore

@@ -0,0 +1,25 @@
+# Go
+bin/
+*.test
+
+# Local databases and secrets
+*.db
+*.sqlite
+*.sqlite3
+.env
+.env.*
+!.env.example
+
+# Node
+node_modules/
+ui/app/dist/
+ui/app/.vite/
+
+# IDE and OS
+.idea/
+.vscode/
+.DS_Store
+
+# Local backend data
+*.db
+*.db-*