feat: add wordvibe_build_page (Word Page Builder over MCP)

Wraps the site tool wpb_build_page: build or update a Word Page from {kind, html} sections. The page lands as a native Word Page (payload in post meta, builder-rendered), so it stays editable and undoable in the builder. Also documents the builder tools in the bundled skill and README.

schemas.py

@@ -13,6 +13,49 @@ _SITE = {
     ),
 }
 
+BUILD_PAGE = {
+    "name": "wordvibe_build_page",
+    "description": (
+        "Build or update a page in the site's Word Page Builder (WPB) from section HTML. Each "
+        "section is wrapped automatically in <section data-wpb-section=\"kind\" data-wpb-id=\"sec-…\">, "
+        "so the page opens natively in the builder and stays editable/undoable there. Use this to "
+        "publish a landing page, or to rebuild a page's sections, without a browser."
+    ),
+    "parameters": {
+        "type": "object",
+        "properties": {
+            "title": {"type": "string", "description": "Page title."},
+            "sections": {
+                "type": "array",
+                "description": (
+                    "Ordered list of sections. Each item: {kind, html} — kind is a kebab-case section "
+                    "name (hero, features, pricing, testimonials, faq, cta, footer, gallery, contact, "
+                    "about, services, custom); html is the section's inner HTML (inline styles are fine)."
+                ),
+                "items": {
+                    "type": "object",
+                    "properties": {
+                        "kind": {"type": "string", "description": "Section kind, e.g. 'hero'."},
+                        "html": {"type": "string", "description": "Inner HTML for the section."},
+                    },
+                    "required": ["kind", "html"],
+                },
+            },
+            "slug": {"type": "string", "description": "URL slug (optional)."},
+            "status": {
+                "type": "string",
+                "description": "draft, publish, pending or private (default: draft).",
+            },
+            "post_id": {
+                "type": "integer",
+                "description": "Existing page ID to update; omit to create a new page.",
+            },
+            "site": _SITE,
+        },
+        "required": ["title", "sections"],
+    },
+}
+
 SITES = {
     "name": "wordvibe_sites",
     "description": (