feat: add configurable CV page layout with builder support

CV page now reads layout config from cv-page.json when available,
supporting single-column, two-column, and full-width hero layouts with
configurable sections, sidebar widgets, and footer columns. Falls back
to the previous hardcoded layout when no config exists.

_data/cvPageConfig.js

@@ -0,0 +1,29 @@
+/**
+ * CV Page Configuration Data
+ * Reads config from indiekit-endpoint-cv plugin CV page builder.
+ * Falls back to null — cv.njk then uses the default hardcoded layout.
+ *
+ * The CV plugin writes a .indiekit/cv-page.json file that Eleventy watches.
+ * On change, a rebuild picks up the new config, allowing layout changes
+ * without a Docker rebuild.
+ */
+
+import { readFileSync } from "node:fs";
+import { resolve, dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+export default function () {
+  try {
+    // Resolve via the content/ symlink relative to the Eleventy project
+    const configPath = resolve(__dirname, "..", "content", ".indiekit", "cv-page.json");
+    const raw = readFileSync(configPath, "utf8");
+    const config = JSON.parse(raw);
+    console.log("[cvPageConfig] Loaded CV page builder config");
+    return config;
+  } catch {
+    // No CV page builder config — fall back to hardcoded layout in cv.njk
+    return null;
+  }
+}