chore: Unify .gitignore at project root

- Improve maintainability with centralized ignore rules

server/.gitignore → .gitignore

@@ -1,3 +1,35 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+*storybook.log
+
+# TypeDoc
+docs
+
+# ------------------------------------------------------------------------------------------
+
 # compiled output
 /dist
 /node_modules