Add dorveille article and full Hugo site scaffold

- content/dorveille.md: 'On the Craft of Invisible Systems'
- assets/css/: ASW layer system (00-reset through 09-landing + Open Props)
- layouts/: baseof, single, list, index — semantic HTML, no classes
- hugo.toml: baseURL asw.trentuna.com, PostCSS + minify pipeline
- package.json: postcss-import, postcss-custom-media, cssnano
- .gitignore: excludes public/, node_modules, build artifacts

Site builds to public/ via hugo --minify. nginx serves public/ statically.

hugo_stats.json

@@ -0,0 +1,68 @@
+{
+  "htmlElements": {
+    "tags": [
+      "a",
+      "article",
+      "blockquote",
+      "body",
+      "dd",
+      "div",
+      "dl",
+      "dt",
+      "em",
+      "footer",
+      "h1",
+      "h2",
+      "h3",
+      "h4",
+      "h5",
+      "head",
+      "header",
+      "hgroup",
+      "hr",
+      "html",
+      "li",
+      "link",
+      "main",
+      "meta",
+      "nav",
+      "ol",
+      "p",
+      "script",
+      "section",
+      "small",
+      "strong",
+      "sup",
+      "table",
+      "tbody",
+      "td",
+      "th",
+      "thead",
+      "time",
+      "title",
+      "tr",
+      "ul"
+    ],
+    "classes": [
+      "footnote-backref",
+      "footnote-ref",
+      "footnotes"
+    ],
+    "ids": [
+      "a-taxonomy-of-agency",
+      "coda",
+      "craft-as-methodology",
+      "fn:1",
+      "fn:2",
+      "fn:3",
+      "fnref:1",
+      "fnref:2",
+      "fnref:3",
+      "principles-of-invisible-design",
+      "the-dorveille-principle",
+      "the-economics-of-attention",
+      "the-table-of-hours",
+      "what-we-subtract"
+    ]
+  }
+}