Restructure docs: move intro and quickstart to framework

Moved documentation files from '00-intro' and '01-quickstart' directories to a unified '00-framework' structure for both English and Chinese content. Updated meta.json files accordingly and removed obsolete files to improve organization and consistency.

Author: hotlong

content/docs-zh-CN/00-intro/ai-codex.mdx …ent/docs-zh-CN/00-framework/ai-codex.mdxcontent/docs-zh-CN/00-intro/ai-codex.mdx renamed to content/docs-zh-CN/00-framework/ai-codex.mdx content/docs-zh-CN/00-intro/ai-codex.mdx renamed to content/docs-zh-CN/00-framework/ai-codex.mdx

@@ -1,5 +1,5 @@
 {
   "title": "Framework",
   "root": true,
-  "pages": ["index", "welcome", "manifesto", "architecture", "ai-codex"]
+  "pages": ["index", "welcome", "manifesto", "architecture", "ai-codex", "quick-start"]
 }