feat: implement dynamic Eleventy tiling blog, modular CSS, and agent customizations

- Add project foundation README.md and root AGENTS.md for pair programming
- Configure .agents/ rules and skills for Eleventy tiling and Obsidian publishing
- Decompose monolithic styles into modular tokens, reset, layout, and component CSS
- Implement Nunjucks layout inheritance (base.njk, post.njk, page.njk) and reusable partials
- Configure Eleventy 3 with markdown-it-anchor, syntax highlighting, and dynamic collections
- Migrate sample prototypes into dynamic dispatches lander, gateway, and Markdown posts
- Add multi-stage Dockerfile and clean-URL nginx.conf for production serving

package.json

@@ -0,0 +1,29 @@
+{
+  "name": "river-rooks-blog",
+  "version": "1.0.0",
+  "description": "Developer-centric personal technical publication and systems architecture blog",
+  "type": "module",
+  "main": "eleventy.config.js",
+  "scripts": {
+    "dev": "eleventy --serve --watch",
+    "build": "eleventy",
+    "clean": "rm -rf _site",
+    "start": "npm run dev"
+  },
+  "keywords": [
+    "eleventy",
+    "blog",
+    "tiling",
+    "nunjucks",
+    "obsidian"
+  ],
+  "author": "River Rooks",
+  "license": "MIT",
+  "devDependencies": {
+    "@11ty/eleventy": "^3.1.6",
+    "@11ty/eleventy-plugin-syntaxhighlight": "^5.0.2",
+    "luxon": "^3.5.0",
+    "markdown-it": "^14.1.0",
+    "markdown-it-anchor": "^9.2.0"
+  }
+}