LANG-1725: Throw IllegalArgumentException instead of IndexOutOfBounds…

[Akshat-coder2106]

Summary

This PR addresses LANG-1725 by updating the Conversion class to throw IllegalArgumentException instead of IndexOutOfBoundsException when a provided index is out of bounds.

Changes

• Conversion.java: Updated binaryBeMsb0ToHexDigit(boolean[], int) to throw IllegalArgumentException. The original IndexOutOfBoundsException is now wrapped as the cause to preserve the technical stack trace.
• ConversionTest.java: Updated the test binaryBeMsb0ToHexDigitPosOutsideArray to expect IllegalArgumentException.
• Javadoc: Updated method documentation to reflect the change in exception type.

Quality Check

• Zero Formatting Noise: I have disabled "Format on Save" and "Optimize Imports" to ensure the diff only contains the necessary logic changes. No unrelated lines or white-spaces have been modified.
• Trailing Newlines: Verified that all modified files end with a single empty line.
• Tests: Ran mvn test -Dtest=ConversionTest and achieved BUILD SUCCESS.