Add mod documentation in seven languages

locale/collection_settings_en.properties

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+collection_settings/dice = Check dice
+collection_settings/dice_hint = Choose dice, disable rolls, or enter NdM, such as 2d6 (up to 100 dice).
+collection_settings/dice_auto = Uses d20 when unspecified.
+collection_settings/no_dice = No dice
+collection_settings/dice_group = Checks