Add AI-powered text generation for product descriptions

Integrate AI text generation API for creating product descriptions.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/ds3R7vP

.gitignore

@@ -4,3 +4,31 @@ dist
 server/public
 vite.config.ts.*
 *.tar.gz
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Uploads
+uploads/*
+!uploads/.gitkeep
+
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Database
+*.db
+*.sqlite
+
+# IDE
+.vscode
+.idea
+*.swp
+*.swo
+*~
+
+# OS
+Thumbs.db