refactor: ♻️ don't use global Buffer or process

I'm a sucker for "best practices" - nodejs/node#26334

src/commands/dev/eval.ts

@@ -7,6 +7,7 @@ import { isThenable } from '@sapphire/utilities';
 import { Stopwatch } from '@sapphire/stopwatch';
 import { Command } from '#structures/Command';
 import { inspect } from 'node:util';
+import { Buffer } from 'node:buffer';
 import { Type } from '@sapphire/type';
 
 // In the future, this may be converted to/accompanied with a context menu interaction

src/config.ts

@@ -1,4 +1,5 @@
 import { cleanEnv, str } from 'envalid';
+import process from 'node:process';
 
 export const env = cleanEnv(process.env, {
 	TOKEN: str({ desc: 'The discord bot token' })

src/index.ts

@@ -6,6 +6,7 @@ import { GatewayIntentBits } from 'discord-api-types/v9';
 import { yellow, green, bold } from 'colorette';
 import { Constants } from 'discord.js';
 import { env } from '#root/config';
+import process from 'node:process';
 
 const client = new SapphireClient({
 	// Trace loggings clutter the console, and should only be used when debugging @sapphire/pieces specifically