Generally revise laws related to health care proxy decisionmakers

This bill updates Montana's health care proxy laws to give patients more control over who makes medical decisions for them if they become unable to do so. It allows adults to designate a trusted decisionmaker at any time before losing capacity, with healthcare providers required to document this choice and prioritize it over other potential decisionmakers. The legislation establishes a clear hierarchy for selecting decisionmakers, placing patient-designated trusted individuals ahead of family members like spouses and children. Additionally, it expands patient rights to include timely information about how hospitals may limit advance directives and ensures patients can have a support person present during care.