Add Account Cost Category Tags for Free and Paid Accounts

Implement Account Categorization System with Free/Paid Tags.

Users should be able to categorize their prop firm accounts based on how they were acquired, specifically distinguishing between "Free" and "Paid" accounts. This feature would allow users to tag accounts that were obtained through giveaways, coupon codes, BOGO offers, or PFM's exclusive "get free account of same size if you get to payout" promotions as "Free," while marking regularly purchased accounts as "Paid." This categorization system would provide users with better cost tracking, clearer portfolio analysis, and more accurate understanding of their actual investment versus total account value, helping them make more informed decisions about their prop trading strategy and ROI calculations.

Original post by San The Trader:

https://discord.com/channels/1398423459662663820/1398660697172348938/1405884686617804911