Add automatic dependency installer and package checks

DEPENDENCY MANAGEMENT:
- Created scripts/install-dependencies.sh - automatic installer for all required packages
- Detects OS (Ubuntu, Debian, CentOS, RHEL, Fedora, Arch, macOS)
- Installs PostgreSQL client (psql) automatically
- Installs Docker & Docker Compose if missing
- Installs utility packages (curl, wget, git)

SCRIPT ENHANCEMENTS:
- Updated setup-database.sh with dependency checking
- Updated generate_data.sh with dependency checking
- Updated verify-setup.sh with dependency checking
- All scripts now prompt to run installer if dependencies are missing
- Interactive prompts guide users through installation

DOCUMENTATION:
- Updated README.md with dependency installation instructions
- Updated QUICKSTART.md with Step 0: Install Dependencies
- Added supported OS list
- Added automatic dependency check notes

USER EXPERIENCE:
- No more manual package installation required
- Scripts fail gracefully with helpful error messages
- One-command installation: ./scripts/install-dependencies.sh
- Automatic detection and installation on Linux/macOS
- Clear instructions for Windows users

This ensures users can get started immediately without hunting for package installation commands.

docs/QUICKSTART.md

@@ -2,6 +2,29 @@
 
 ## 🚀 Get Up and Running in 5 Minutes
 
+### Step 0: Install Dependencies (Optional - 5 minutes)
+
+**If you don't have Docker, PostgreSQL client (psql), or other required tools:**
+
+```bash
+# Make script executable
+chmod +x scripts/install-dependencies.sh
+
+# Run the installer
+./scripts/install-dependencies.sh
+```
+
+**What this installs:**
+- PostgreSQL client (psql)
+- Docker & Docker Compose
+- Utility packages (curl, wget, git)
+
+**Supported OS:** Ubuntu, Debian, CentOS, RHEL, Fedora, Arch Linux, macOS
+
+**Note:** All other scripts will automatically check for dependencies and prompt you to install them if missing.
+
+---
+
 ### Step 1: Start Docker Containers (1 minute)
 
 ```bash