Bipolar Disorder Drugs and Treatment Market Size & Forecasts 2026-2035, By Segments (Distribution Channel, Route of Administration, Mechanism of Action, Drug Class), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Johnson & Johnson, Pfizer, Otsuka Pharmaceutical, AbbVie, Eli Lilly)