Add a browser JS scraper for hub games

diff --git a/EZSets/.gitignore b/EZSets/.gitignore
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+*.json

diff --git a/EZSets/FreelyAvailableScraper.js b/EZSets/FreelyAvailableScraper.js
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+++ b/EZSets/FreelyAvailableScraper.js
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+// Initialize games as an empty set initially, i.e. games = new Set();
+// Then run this script over and over again in https://retroachievements.org/hub/22750 (Freely Available in ForumTopic)
+// Make sure to also set the pagination to max so you don't have to run this a lot (max was 200 at the time of writing)
+pageGames = new Set(
+       Array
+       .from(document.querySelectorAll('tbody tr td a[href^="https://retroachievements.org/game/"]'))
+       .map(e => e.href),
+);
+next = document.querySelector('button[aria-label^="Go to next page"]');
+next.click();
+games = new Set([...games, ...pageGames]);
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