Research how to generate gas reports

[PaulRBerg]

Foundry does NOT currently have native support for:

• Parameterized tests with multiple inputs/ outputs, e.g. like test.each in JavaScript.
• Gas reports for free functions

See these open issues for more details

• Table tests foundry-rs/foundry#858
• feat(snapshots): track internal gas usage foundry-rs/foundry#3766

The only solution I can think of right now would be to create a mock contract specifically for testing, and add proxy functions in that mock for calling PRBMath's free functions. Similar to the PRBMathUD60x18Mock contract that used to exist before the switch to Foundry.

However, that wouldn't solve the parameterized tests issue, as per the explanation I gave in this comment.