feat: add project files and enhance gitignore

Author: CC11001100

.codeflicker/preview/start-command.sh

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+npm run dev

.cursor/rules/riper-5.mdc

@@ -0,0 +1,55 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+# Dependencies
+node_modules
+
+# Build output
+dist
+dist-ssr
+build
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# Test coverage
+coverage
+
+# Cache
+.cache
+*.tsbuildinfo
+
+# Playwright
+playwright-report
+test-results
+
+# Backup files
+*.bak
+
+
+# Nested git repositories
+leetcode-139-word-break/