Add blog post: Prescription, billing, and access improvements in CARE

[aravindm4]

Adds a new blog post covering the July 2026 CARE release, including:

• Nutrition and medication administration
• Prescriptions (infinite scrolling, date-range dosing)
• Appointments and billing improvements
• Clinical data alignment with FHIR
• Files and uploads (camera capture, plugin extensibility)
• Access and security (phone-based password reset, session purge)
• Usability improvements (patient age component, update prompts)
• Under the hood (Vite plugin registration, Node.js 24)
• Operations and ecosystem (ISO certification, DPG renewal)