Add fe-map and iss sources, The Shape of Distance as published, contribution guide

- femap/: planar best-effort solver, build, result and page (fe-map.aethercosmology.com)
- satellites/: The Sync Test build, ISS elements, SatNOGS timings and page (iss.aethercosmology.com)
- src/handoff/The_Shape_of_Distance_PRESENTATION.html: inputs for both
- CONTRIBUTING.md; README and LICENSE-DATA cover all four sites; GitHub mirror for issues and pull requests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

tests/run.sh

@@ -13,6 +13,10 @@ node card_sel.mjs                                # every route x map x size: no
 node trunc.mjs     | tail -1                     # no truncated text in the route card
 node view_btns.mjs | tail -2                     # zoom / reset buttons
 node offline.mjs   | tail -3                     # site/index.html with the network blocked
-node newsec.mjs    | tail -2                     # networks, flat arrangements, code: counts and layout
+node newsec.mjs    | tail -2                     # networks and code sections: layout, no flat-fit section
+node overlap.mjs   | tail -1                     # a click where routes overlap selects the top-drawn route
+node hero.mjs      | tail -1                     # hero renders at desktop and phone width
 node mode.mjs      | cut -c1-60                  # cable / straight toggle changes the counts
+node sync.mjs      | tail -1                     # The Sync Test (satellites/): 8 viewports, readouts, controls
 [ "${LIVE:-0}" = 1 ] && node live.mjs           # LIVE=1: the public site
+node femap.mjs     | tail -1                     # The Best Flat Map (femap/): 8 viewports, live solve, 3D release