refactor: migrate to pnpm monorepo with Payload CMS backend and Astro frontend to support scalable website development and AI-assisted workflows

.gitignore

@@ -0,0 +1,43 @@
+# Dependencies
+/node_modules
+**/node_modules
+
+# Build output
+/dist
+/build
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# Environment variables
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+.dev.vars
+
+# IDE and editor directories
+.idea/
+.vscode/
+
+# OS-generated files
+.DS_Store
+.DS_Store?
+Thumbs.db
+
+# Temporary files
+*.tmp
+
+# AI and tool directories
+.codex/
+.gemini/
+.turbo/
+.wrangler/
+
+# OS-generated files in subdirs
+**/.DS_Store