Add SaaSCity to General Launch Platforms

[nyyhao]

Adds SaaSCity to the list.

• URL: https://saascity.io
• Submit page: https://saascity.io/submit
• Domain Rating: 46 (Ahrefs)
• Listing: free listing with an indexed product page; paid tiers add a dofollow backlink and map placement
• Review: every submission is manually reviewed, usually approved within 24h

SaaSCity is a gamified SaaS directory — each listing becomes a building on a live isometric city map.

The entry follows the existing format used in this section.