feat: add a function to check if a position is liquidable.

[zarboq]

Feature Request

Describe the Feature Request

We need a way to check whether we should liquidate a position or not.

Describe Preferred Solution

We could do a function that take in input a Position struct and current token prices of the market. Then we check in the function if the position is in a state in which it can be liquidated.

Additional Context

Insightful code to check for position liquidation can probably be found in GMX solidity code or here