Consolidate all moonweb sites into single Eleventy config

- Single eleventy.config.js at root with computed pathPrefix per section
- Accent colors inlined in base.njk (no per-site theme.css needed)
- Hub pages output at root via explicit permalinks
- Per-section sitemaps with tag-based collections
- .eleventyignore excludes stefankoelle, timecapsule, markdown files
- Deleted: 5 per-site configs, merge script
- Simplified: package.json (single build/dev commands)
- Simplified: GitHub Actions workflow (no matrix, no merge job)
- Fixed: parent links for sub-site detail pages

code/404.html

@@ -1,9 +1,10 @@
 ---
 title: "Page Not Found"
 section: "code"
+tags: "code"
 description: "The page you are looking for does not exist."
 layout: base.njk
-permalink: /404.html
+permalink: /code/404.html
 ---
 <div class="error-page">
   <h1>404</h1>

code/eleventy.config.js

@@ -1,20 +0,0 @@
-module.exports = function (eleventyConfig) {
-  eleventyConfig.addGlobalData("site", { url: "https://www.moonweb.org", pathPrefix: "/code" });
-  eleventyConfig.addFilter("date", (d) => d.toISOString());
-  eleventyConfig.addPassthroughCopy({ "shared/theme-code.css": "theme.css" });
-  eleventyConfig.addPassthroughCopy({ "shared/base.css": "shared-base.css" });
-  eleventyConfig.addPassthroughCopy({ "shared/favicon/code.svg": "favicon.svg" });
-  eleventyConfig.addPassthroughCopy({ "code/robots.txt": "robots.txt" });
-
-  return {
-    dir: {
-      input: "code",
-      includes: "../shared/_includes",
-      output: "dist/code"
-    },
-    serverOptions: {
-      host: "0.0.0.0",
-      port: 8084
-    }
-  };
-};

code/index.njk

@@ -1,6 +1,7 @@
 ---
 title: "Open Source Projects — GitHub Repos & Code | moonweb"
 section: "code"
+tags: "code"
 description: "Curated catalog of my public GitHub projects — automation, dev tools, web apps, and firmware."
 layout: base.njk
 subcategories:

code/sitemap.xml.njk

@@ -1,5 +1,6 @@
 ---
-permalink: /sitemap.xml
+permalink: /code/sitemap.xml
+sitemapCollection: "code"
 eleventyExcludeFromCollections: true
 ---
 {% include "sitemap.njk" %}