Uploading the static assets to R2 bucket (#3921)

Uploads all the folders inside `./assets` folder to a new R2 bucket
called `cdn`. Uses the package version as the prefix, so that we can
host multiple versions of the assets.

### Change Type

<!-- ❗ Please select a 'Scope' label ❗️ -->

- [ ] `sdk` — Changes the tldraw SDK
- [ ] `dotcom` — Changes the tldraw.com web app
- [ ] `docs` — Changes to the documentation, examples, or templates.
- [ ] `vs code` — Changes to the vscode plugin
- [x] `internal` — Does not affect user-facing stuff

<!-- ❗ Please select a 'Type' label ❗️ -->

- [ ] `bugfix` — Bug fix
- [ ] `feature` — New feature
- [ ] `improvement` — Improving existing features
- [ ] `chore` — Updating dependencies, other boring stuff
- [ ] `galaxy brain` — Architectural changes
- [ ] `tests` — Changes to any test code
- [x] `tools` — Changes to infrastructure, CI, internal scripts,
debugging tools, etc.
- [ ] `dunno` — I don't know


### Test Plan

1. Add a step-by-step description of how to test your PR here.
2.

- [ ] Unit Tests
- [ ] End to end tests

### Release Notes

- Upload our static assets (fonts, icons, embed-icons, translations) to
a R2 bucket so that we can move away from using unpkg and start using
our own cdn.

scripts/upload-static-assets.ts

@@ -0,0 +1,60 @@
+import { PutObjectCommand, S3Client } from '@aws-sdk/client-s3'
+import fs from 'fs'
+import path from 'path'
+import { makeEnv } from './lib/makeEnv'
+
+const env = makeEnv(['R2_ACCESS_KEY_ID', 'R2_ACCESS_KEY_SECRET'])
+
+const R2_URL = 'https://c34edc4e76350954b63adebde86d5eb1.r2.cloudflarestorage.com'
+const R2_BUCKET = 'cdn'
+const ASSETS_FOLDER = './assets'
+
+const R2 = new S3Client({
+	region: 'auto',
+	endpoint: R2_URL,
+	credentials: {
+		accessKeyId: env.R2_ACCESS_KEY_ID,
+		secretAccessKey: env.R2_ACCESS_KEY_SECRET,
+	},
+})
+
+async function uploadFile(key: string, fullPath: string) {
+	const fileStream = fs.createReadStream(fullPath)
+	const uploadParams = {
+		Bucket: R2_BUCKET,
+		Key: key,
+		Body: fileStream,
+	}
+	await R2.send(new PutObjectCommand(uploadParams))
+}
+
+async function uploadDirectory(prefix: string, directoryPath: string) {
+	const entries = fs.readdirSync(directoryPath, { withFileTypes: true })
+
+	for (const entry of entries) {
+		const fullPath = path.join(directoryPath, entry.name)
+		const key = path.join(prefix, entry.name)
+
+		if (entry.isDirectory()) {
+			await uploadDirectory(key, fullPath)
+		} else if (entry.isFile()) {
+			await uploadFile(key, fullPath)
+		}
+	}
+}
+
+export async function uploadStaticAssets(version: string) {
+	try {
+		const entries = fs.readdirSync(ASSETS_FOLDER, { withFileTypes: true })
+		// Loop through all the folders in the assets folder and upload them.
+		for (const entry of entries) {
+			if (entry.isDirectory()) {
+				const folderName = entry.name
+				await uploadDirectory(`${version}/${folderName}`, `${ASSETS_FOLDER}/${folderName}`)
+			}
+		}
+	} catch (e) {
+		console.error(e)
+		process.exit(1)
+	}
+}