Create Trade Helper to Manage Bets Independently

Create a helper class that accepts order tickets and calculates the profit-loss on the set of orders its managing, independent of the portfolio holdings. This could allow creating multiple "Trades" and tracking each "bet" independently.

E.g.
Open a covered call position (1-Option, 1-Opening Order) -> Est P&L on Trade.
Later open a second covered call position -> Est P&L on Trade independently based on the fill prices of the second order tickets not on the average portfolio value.

The helper should include:

• Properties like "ClosingProfit" to estimate the current market price of the trade set.
• AddOrder() to add a new order to the Trade Set.
• Close() to flatten the Trade and take profit.

Expected Behavior

Some concept of trade management in LEAN.

Actual Behavior

No "trade" concept in LEAN; separate orders with portfolio focus.
Resulting in users making many different personal frameworks to implement the behavior.

Potential Solution

Create a Trade helper which lets users group their orders into trades and manage each investment/bet independently.

Checklist

• I have completely filled out this template
• I have confirmed that this issue exists on the current master branch
• I have confirmed that this is not a duplicate issue by searching issues

The issue does not name files, tests, or an existing entry point; start by reviewing how order tickets and portfolio holdings are represented in LEAN. Before implementation, define the Trade API, profit-loss behavior, order grouping, and Close semantics, then establish tests that show independent trade tracking.