Reimplementation of the High-Score grid mini-game from the LoL gamer
cognitive-study battery (Brain & Learning Lab, UNIGE) as a stand-alone
jsPsych 8.2.1 experiment. 3 rounds × 50 picks on a 5×10 grid; per-round
reward sequences are read verbatim from rewards/* (no shuffle), so the
first newly-revealed square gets the first value, etc. Re-clicking an
already-uncovered square returns the value it first revealed.

Seeded from library.nccr-ttf-ddg.ch/static/tasks/grid/ — the bundle that
was previously source: local in registry.yaml. Adds README.md and a
.gitlab-ci.yml modelled on lexical-decision-task so the bundle is now
published as a GitLab CI artifact (task.json + dist/ + task.zip).