feat: add @discordjs/util (#8591)

* feat: add @discordjs/util

* fix: builders test

* refactor: make rest use lazy for ESM import

* chore: make requested changes

* Apply suggestions from code review

Co-authored-by: Parbez <imranbarbhuiya.fsd@gmail.com>
Co-authored-by: A. Román <kyradiscord@gmail.com>

* chore: make requested changes and add tests

* chore: regen lockfile

* test: add type tests

* chore: push missing files

* chore: make requested changes

* chore: update CI stuff

* chore: fix lockfile

* chore: make requested changes

Co-authored-by: Parbez <imranbarbhuiya.fsd@gmail.com>
Co-authored-by: A. Román <kyradiscord@gmail.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/proxy/package.json

@@ -55,6 +55,7 @@
 	"homepage": "https://discord.js.org",
 	"dependencies": {
 		"@discordjs/rest": "^1.0.0",
+		"@discordjs/util": "workspace:^",
 		"tslib": "^2.4.0",
 		"undici": "^5.10.0"
 	},