AI-Powered Mental Health Chatbot Market Size, Share & Industry Analysis, By Component (Software, Services), By Deployment (Cloud-Based, On-Premise & Hybrid), By Technology (LLMs & NLP, Machine Learning, Deep Learning, Speeh/Voice AI), By Indication (Depression, Anxiety, Stress & Burnout, Substance Use Disorders, Sleep Disorders), By Application (Self-guided Mental Health, Screening & Triage, Crisis Escalation, Care Navigation, Therapy Support/CBT Coaching), By End User (Healthcare Providers, Payers, Employers/EAPs, Direct-to-Consumer/Individuals), and Regional Forecast, 2026-2034