Generally revise dangerous drug schedule

HB 41 adds gabapentin to Montana's Schedule V list of controlled substances under the "depressants" category. This change directly affects medical providers who prescribe gabapentin (used for nerve pain, seizures, and other conditions), pharmacists who dispense it, and patients using the medication. The bill amends Montana Code § 50-32-232 to explicitly include gabapentin - identified by its chemical name "1-(aminomethyl)cyclohexaneacetic acid" - in Schedule V depressants alongside drugs like pregabalin. This policy update standardizes gabapentin's regulatory classification without altering its medical use or prescribing rules.