Rename the factory to Robot Market, fix GPS search and add GPS test points

- The factory company is now "شرکت روبات مارکت" on signs, dialogue,
  briefing, map label, manifest and README
- Real-world mode no longer shows "location not found" for every
  problem: it takes a quick coarse Wi-Fi/network fix first, keeps
  searching after a GPS timeout, and reports permission denied (1),
  location off (2), still searching (3) or a non-HTTPS page separately
- Three GPS test machines at real coordinates beside the factory, only
  present in real-world mode; the closest machine within reach is used
  and the arrival radius is twice the GPS error (12–40 m)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/factory.js

@@ -12,7 +12,7 @@ function stripes(c, w, h, base, line, every) {
 }
 
 /**
- * The Negin Sazan Pishgam Radmehr Atousa compound: production hall (where the game starts),
+ * The Robot Market factory compound: production hall (where the game starts),
  * office, fenced yard and gate. Layout uses a local frame: u runs along the driveway towards the
  * gate, v across it. Returns world-space collision footprints and key positions.
  */