Add connectd custom integration brand

[sudoxreboot]

Summary

Adding brand icons for the connectd custom integration.

connectd is a daemon that discovers builders and creators online who share values around privacy, self-hosting, decentralization, and intentional community. It analyzes GitHub profiles, Mastodon accounts, and other platforms to find people with aligned values for community building.

Custom Integration Details

• Domain: connectd
• GitHub: https://github.com/sudoxnym/connectd
• Documentation: https://github.com/sudoxnym/connectd/blob/master/README.md

Checklist

• [x] Icon provided (256x256)
• [x] HiDPI icon provided (512x512)
• [x] Square aspect ratio (1:1)
• [x] PNG format