Check for available quantity on consumables before checkout

[snipe]

This should handle the edge case where two people are hitting the consumables UI/API at the same time and trying to check out something that doesn't have enough left to allocate a consumable to the last user.

[what-the-diff]

PR Summary

• Enhanced translation string for consumable availability
  Added a new translation string to handle cases when there are not enough consumables left for the checkout process.

• Updated ConsumableCheckoutController
  Improved the create() and store() methods to check the availability of at least one consumable before allowing users to proceed with the checkout process, displaying an error message if the condition isn't met.