How to perform 'Parallel Base64 Encode' in Nim.
# Task: Parallel Base64 Encode
# Language: Nim
proc parallel_base64_encode() =
# Implementation for Parallel Base64 Encode
var result = ...; # Initialize variable
# TODO: Implement core logic here
# Step 1: Prepare data
# Step 2: Process Parallel Base64 Encode
echo("Done");