Generally revise laws related to presentence investigations

SB 84 revises Montana's rules for presentence investigations, which are reports courts use to inform sentencing decisions. It requires courts to order these investigations after guilty pleas or convictions for most felonies (unless a recent report exists), sets a 30-day deadline for reports, and adds specific requirements: mental health evaluations for defendants claiming mental impairment at the time of offense, and psychosexual evaluations for certain sex offense convictions. The bill directly affects courts, probation officers, and defendants, particularly those with mental health considerations or sex offense convictions. It clarifies when investigations are mandatory, streamlines reporting timelines, and ensures key evaluations are included in sentencing considerations.