Esophageal Cancer Therapeutics Market Size, Share & Industry Analysis, By Therapy Type (Chemotherapy, Immunotherapy, Targeted Therapy, and Others), By Cancer Type (Squamous Cell Esophageal Cancer, Adenocarcinoma, and Others) By Route of Administration (Oral and Parenteral), By Distribution Channel (Hospital Pharmacies, Retail Pharmacies & Drug Stores, and Others), and Regional Forecast, 2026-2034