Command to allow the user to buy more effects (#424)

# Description

- Create a command to generate an embed for the user to be able to buy more effects
- This embed will contain the details about the effect as well as 2 buttons; Confirm and Cancel
- The confirm button will call the button event to:
    - Remove the currency from the user
    - Give the user the effect to their inventory
- The cancel button will just disable the buttons, so the user can't accidentally use it if they don't want to.

#381

## Type of change

Please delete options that are not relevant.

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

# How Has This Been Tested?

- Have created unit tests and tested locally

# 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: #424
Reviewed-by: VylpesTester <tester@vylpes.com>
Co-authored-by: Ethan Lane <ethan@vylpes.com>
Co-committed-by: Ethan Lane <ethan@vylpes.com>

src/commands/effects/Buy.ts

@@ -0,0 +1,22 @@
+import { CommandInteraction } from "discord.js";
+import EffectHelper from "../../helpers/EffectHelper";
+
+export default async function Buy(interaction: CommandInteraction) {
+    const id = interaction.options.get("id", true).value!;
+    const quantity = interaction.options.get("quantity")?.value ?? 1;
+
+    const idValue = id.toString();
+    const quantityValue = Number(quantity);
+
+    const result = await EffectHelper.GenerateEffectBuyEmbed(interaction.user.id, idValue, quantityValue, false);
+
+    if (typeof result == "string") {
+        await interaction.reply(result);
+        return;
+    }
+
+    await interaction.reply({
+        embeds: [ result.embed ],
+        components: [ result.row ],
+    });
+}