The rev() function in bigdecimal.move doesnt explicitly check for division by zero when calculating the reciprocal of a BigDecimal:
Albeit, all other division operations have zero checks:
https://github.com/initia-labs/movevm/blob/7096b76ba9705d4d932808e9c80b72101eafc0a8/precompile/modules/initia_stdlib/sources/bigdecimal.move#L119-L124
Add this test case to bigdecimal.move:
Test outputs this:
deposit_reward_for_chain and unbonding_share_amount_ratio that call this function have safeguards in place.
While its already protected by the underlying biguint module, itd still be safe to add explicit checks.
