Support new centralized CryoKey Lite API

Code from the original CryoKey.js is now available on the main CryoKey
page. Therefore, to keep things up to date, we refer to that JS file for
core functionality. Also, we make use of the new JSON redemption response
to future-proof the extension.

Change-Id: I22ef646953ef4346a498ab5382cc66ba6dd14046
Localisation updates from https://translatewiki.net.

Change-Id: I886b62e1b838c91a3e47e93f05fcc6be9865d79b
Localisation updates from https://translatewiki.net.

Change-Id: I2636abaac6397f70ef78eaa5916ddf61a5e5f0ba
Localisation updates from https://translatewiki.net.

Change-Id: I9214ac96fcfb8bb65b6f463ce5b9155215501585
Localisation updates from https://translatewiki.net.

Change-Id: I7ca3c3034a0d946044aa27052068ca0caaa3f030
Localisation updates from https://translatewiki.net.

Change-Id: Id059161e9c83fdf6a366821e8701b55ee8c919b3
Localisation updates from https://translatewiki.net.

Change-Id: I2290800a373eed85f8a8e044f65bfbbb299aa11b
Localisation updates from https://translatewiki.net.

Change-Id: Ibf1dd289e20bf4163e923042ae787830be18849e
Localisation updates from https://translatewiki.net.

Change-Id: Ia2096055f786bb567828b5ec2f0dec0a1f38f628
Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: I3fac715049c9fd1c5da09040a786b51082abaf4f