chore: import SiteForge Factory V5 source (baseline)

导入 SiteForge Factory V5 基线源码：
- FastAPI + SQLite + Docker Compose（Web + Worker）架构
- 四套商业主题 × 14 页面模板（1.1.0，含历史版本快照）
- 四种建站模式骨架 + 迁移审计 + 发布门禁
- 52 项 pytest 测试
- 补全计划主文档 docs/superpowers/plans/

Co-Authored-By: Claude Code <noreply@anthropic.com>

themes/industrial/versions/0.3.0/manifest.json

@@ -0,0 +1,38 @@
+{
+  "id": "industrial",
+  "name": "工业制造",
+  "description": "工业蓝与工程网格，产品分类及技术资料",
+  "version": "0.3.0",
+  "style": "technical",
+  "entry": "site.html",
+  "styles": [
+    "theme.css",
+    "blocks.css"
+  ],
+  "page_templates": [
+    "home",
+    "about",
+    "contact",
+    "listing",
+    "product",
+    "article",
+    "brand",
+    "standard",
+    "notfound"
+  ],
+  "blocks": [
+    "hero",
+    "richtext",
+    "features",
+    "stats",
+    "collection",
+    "image_text",
+    "gallery",
+    "faq",
+    "cta",
+    "attributes",
+    "spacer"
+  ],
+  "responsive": true,
+  "auto_binding": true
+}