Change header and footer "Features" links to point to the new
"#philosophy" section and rename them to "Why Blade" to align
with the recent landing page redesign.
- Add blog content collection schema and welcome post
- Create blog index, post layout components, and dynamic routing
- Add `@astrojs/rss` dependency and implement RSS feed generation
- Add blog links to header and footer navigation
- Update changelog with Gemini 3.1 Pro enhancement notes
kekePower