Create ability to drop multiple cards in a row (#376)

- Create a `/multidrop` command
  - This will take the price of 10 drops from you and give you 11 cards to sort through
  - You then have a choice to keep the card or sacrifice it
- Create the `multidrop keep` and `multidrop sacrifice` button events

#262

Reviewed-on: #376
Reviewed-by: VylpesTester <tester@vylpes.com>
Co-authored-by: Ethan Lane <ethan@vylpes.com>
Co-committed-by: Ethan Lane <ethan@vylpes.com>

src/constants/CardConstants.ts

@@ -3,4 +3,8 @@ export default class CardConstants {
     public static readonly TimerGiveAmount = 10;
     public static readonly DailyCurrency = 100;
     public static readonly StartingCurrency = 300;
+
+    // Multidrop
+    public static readonly MultidropCost = this.ClaimCost * 10;
+    public static readonly MultidropQuantity = 11;
 }

src/constants/ErrorMessages.ts

@@ -0,0 +1,8 @@
+export default class ErrorMessages {
+    public static readonly BotSyncing = "Bot is currently syncing, please wait until its done.";
+    public static readonly SafeMode = "Safe Mode has been activated, please resync to continue.";
+    public static readonly UnableToFetchCard = "Unable to fetch card, please try again.";
+    public static readonly UnableToFetchUser = "Unable to fetch user, please try again.";
+
+    public static readonly NotEnoughCurrency = (need: number, have: number) => `Not enough currency! You need ${need} currency, you have ${have}!`;
+}