fix(lib.waitFor): Improved Timeout Calculation and Error Message Formatting

[Kenshiin13]

Description

This PR includes some minor fixess to the lib.waitFor function. The changes aim to improve accuracy in handling timeout calculations and error message formatting.

Changes Made

• Removed the redundant if condition checking for timeout truthiness or nil value.
• Fixed the calculation of the timeout on the client-side to ensure accurate representation in milliseconds.
• Adjusted the error message formatting to accurately represent milliseconds.

Previous Behaviour

• When running the lib.waitFor function with timeout value of 1000:
  • On the server, the function times out after approximately 1 second, but the error message incorrectly prints "1.0ms" instead of "1000ms".
  • On the client, the function does not only print the incorrect error message, but also won't time out until after approximately 10 seconds.

Current Behaviour (Following the fix)

• When running the lib.waitFor function with timeout value of 1000:
  • On both the server and client, the lib.waitFor function now correctly displays the error message with the accurate timeout in milliseconds. Additionally, the function now consistently times out after the correct duration.