Removed numerous local image and document files from content posts and updated markdown files to reference external image and document URLs instead. This reduces repository size and centralizes media hosting, improving maintainability.

Added the content and images for the 2025-09-30 newsletter post, covering topics such as Agentic AI, Java garbage collectors, monorepo philosophy in R, distributed system architecture patterns, and code line sorting. Also updated .claude/settings.local.json to allow Bash(find:*) commands.