Add comment to hex encoding util

Author: jeffsmale90

packages/delegation-core/src/utils.ts

@@ -1,3 +1,16 @@
+/**
+ * Converts a numeric value to a hexadecimal string with zero-padding, without 0x prefix.
+ *
+ * @param options - The options for the conversion.
+ * @param options.value - The numeric value to convert to hex (bigint or number).
+ * @param options.size - The size in bytes for the resulting hex string (each byte = 2 hex characters).
+ * @returns A hexadecimal string prefixed with zeros to match the specified size.
+ * @example
+ * ```typescript
+ * toHexString({ value: 255, size: 2 }) // Returns "00ff"
+ * toHexString({ value: 16n, size: 1 }) // Returns "10"
+ * ```
+ */
 export const toHexString = ({
   value,
   size,