Add session, client and server with the promise result API

src/uuid.ts

@@ -0,0 +1,23 @@
+import { randomBytes } from 'node:crypto';
+
+/**
+ * A UUID version 7: 48 bits of Unix milliseconds followed by random bits, so ids sort by creation
+ * time without carrying a MAC address the way version 1 does.
+ */
+export function uuidv7(): string {
+	const bytes = randomBytes(16);
+
+	bytes.writeUIntBE(Date.now(), 0, 6);
+	bytes.writeUInt8((bytes.readUInt8(6) & 0x0F) | 0x70, 6);
+	bytes.writeUInt8((bytes.readUInt8(8) & 0x3F) | 0x80, 8);
+
+	const hex = bytes.toString('hex');
+
+	return [
+		hex.slice(0, 8),
+		hex.slice(8, 12),
+		hex.slice(12, 16),
+		hex.slice(16, 20),
+		hex.slice(20),
+	].join('-');
+}