Feature request: add Trendshift as a source (trending repo momentum signal)

Problem

last30days searches Reddit, X, YouTube, HN, GitHub, Digg, etc. specifically to surface what's trending right now — yet it doesn't look at Trendshift, a site whose entire purpose is tracking trending GitHub repos day-to-day. For GitHub-related topics/discovery mode, that's a trend signal sitting right there and unused — kind of ironic for a tool literally built around finding trends.

Proposed Solution

Add Trendshift (trendshift.io) as a source: pull a repo's current trending rank and rank history from Trendshift's public pages (no auth, same free/zero-key pattern as arXiv/Techmeme), and surface it in GitHub-mode output and discovery mode as a trending signal alongside stars/PR velocity.

Alternatives Considered

No response