Generally revise the laws regarding claims requiring expert witness testimony

This bill requires Montana courts to evaluate four specific criteria before allowing an expert witness to testify in legal cases. The law mandates that judges assess whether the expert's knowledge will help the jury understand evidence, if the testimony relies on sufficient data, if it uses reliable methods, and if the expert properly applies those methods to the case facts. This change directly impacts civil and criminal proceedings where expert testimony is used, ensuring courts systematically verify the reliability and relevance of such evidence. The bill codifies these requirements into Montana's existing evidence rules without altering the overall structure of the legal system.