feat: complete install wizard with db, mail, storage, security & third-party config

[roncodes]

Summary

This PR replaces the minimal 4-variable install-fleetbase command with a full 9-step interactive installation wizard, making the Fleetbase CLI suitable for both development and production deployments out of the box.

---

Problem

The existing install-fleetbase command only configured four environment variables (APP_KEY, CONSOLE_HOST, ENVIRONMENT, APP_DEBUG). This left critical configuration gaps:

• Database ran with an empty root password (MYSQL_ALLOW_EMPTY_PASSWORD: yes) and had no path to an external managed database
• Mail was never configured — password resets, invitations, and notifications silently failed
• WebSocket origins were unrestricted (SOCKETCLUSTER_OPTIONS was never set)
• File storage defaulted to ephemeral local container storage with no S3/GCS option
• Session domain was hardcoded to localhost, breaking session cookies on real domains
• No pre-flight checks — missing Docker, Git, or port conflicts were only discovered after failure

---

Changes

Pre-flight Checks (Step 0)

• Verifies docker, docker compose (v2), git, and openssl are installed
• Warns (non-blocking) on port conflicts for 8000 (API), 4200 (Console), 3306 (MySQL), 38000 (SocketCluster)

Core Configuration (Step 1)

• Adds APP_NAME prompt alongside existing host/environment/directory options

Database Configuration (Step 3)

• Choose bundled Docker MySQL (auto-generated secure credentials via crypto.randomBytes) or external MySQL/RDS
• Sets DATABASE_URL, MYSQL_ROOT_PASSWORD, MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE, MYSQL_ALLOW_EMPTY_PASSWORD: no

Mail Configuration (Step 4)

• Select driver: SMTP, Mailgun, Postmark, SendGrid, Resend, AWS SES, or log-only
• Collects driver-specific credentials
• Sets MAIL_MAILER, MAIL_HOST, MAIL_PORT, MAIL_USERNAME, MAIL_PASSWORD, MAIL_FROM_ADDRESS, MAIL_FROM_NAME and driver-specific keys

File Storage (Step 5)

• Choose local disk, AWS S3, or Google Cloud Storage
• Sets FILESYSTEM_DRIVER, AWS_* / GOOGLE_CLOUD_* variables

Security & CORS (Step 6)

• Auto-derives SESSION_DOMAIN from the configured host
• Restricts SOCKETCLUSTER_OPTIONS origins to the configured host
• Prompts for additional FRONTEND_HOSTS for CORS

Third-Party APIs (Step 7)

• Optional: IPINFO_API_KEY, GOOGLE_MAPS_API_KEY, GOOGLE_MAPS_LOCALE, TWILIO_SID, TWILIO_TOKEN, TWILIO_FROM

Config Writing (Step 8)

• Writes a complete docker-compose.override.yml covering application, socket, and database services
• Backs up any existing override file with a timestamp suffix
• Active database readiness polling (mysqladmin ping) instead of a fixed sleep

Post-Install Summary (Step 9)

• Rich summary showing all configured and skipped items with next steps

Non-Interactive Mode

• --non-interactive flag skips all optional prompts with safe defaults (useful for CI/CD)

New Helper Functions

• isPortAvailable() — TCP port conflict detection
• execAsync() — promisified child process execution
• buildEnvBlock() — clean YAML environment block builder