e07a9e87e6
Add minimal e2e pipeline to transform content → HTML: - src/error.rs: Custom error types with thiserror - src/content.rs: YAML frontmatter parsing via gray_matter - src/render.rs: Markdown → HTML via pulldown-cmark - src/templates.rs: Maud templates for base layout and posts - src/main.rs: Pipeline orchestrator All 15 blog posts successfully rendered to public/blog/*/index.html. Added thiserror and walkdir dependencies. Added public/ and DepMap fragment to .gitignore and AGENTS.md.