Update footer text in CardDropHelperMetadata to include card number (#159)

# Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

- Update the footer text in CardDropHelperMetadata to include card number

#127

## Type of change

Please delete options that are not relevant.

- [x] New feature (non-breaking change which adds functionality)

# How Has This Been Tested?

Please describe the tests that you ran to verify the changes. Provide instructions so we can reproduce. Please also list any relevant details to your test configuration.

- This has been tested by running the `/drop`, `/dropnumber` commands, and `Reroll` button event. All display the card number on the footer now

# Checklist

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that provde my fix is effective or that my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream modules

Reviewed-on: https://gitea.vylpes.xyz/External/card-drop/pulls/159
Reviewed-by: VylpesTester <tester@vylpes.com>
Co-authored-by: Ethan Lane <ethan@vylpes.com>
Co-committed-by: Ethan Lane <ethan@vylpes.com>

src/helpers/CardDropHelperMetadata.ts

@@ -63,7 +63,7 @@ export default class CardDropHelperMetadata {
         return new EmbedBuilder()
             .setTitle(drop.card.name)
             .setDescription(description)
-            .setFooter({ text: CardRarityToString(drop.card.type) })
+            .setFooter({ text: `${CardRarityToString(drop.card.type)} · ${drop.card.id}` })
             .setColor(CardRarityToColour(drop.card.type))
             .setImage(`attachment://${imageFileName}`);
     }