chore: import upstream snapshot with attribution

apps/sim/tools/servicenow/utils.ts

@@ -0,0 +1,10 @@
+/**
+ * Creates a Basic Authentication header from username and password
+ * @param username ServiceNow username
+ * @param password ServiceNow password
+ * @returns Base64 encoded Basic Auth header value
+ */
+export function createBasicAuthHeader(username: string, password: string): string {
+  const credentials = Buffer.from(`${username}:${password}`).toString('base64')
+  return `Basic ${credentials}`
+}