fix: vendor per-kind sites in the hub; drop stale blog docs

- collect.py: when a kind points at the shared site root, copy only the
  per-kind subdir (site/lib -> <repo>/lib) instead of the whole site, so
  stray single-site build output never leaks into the hub
- Purge stale collected artifacts (404.html, assets/, search/, sitemaps,
  objects.inv, duplicate mcp/) from every repo dir, matching the cleaned
  source site/ roots
- Refresh collected output from source repos, incl. the khata-app app
- Remove the vendored Blog API docs (config.yml entry + blog/) and its card

openapi-first/mcp/modules/openapi_first.cli.json

@@ -1,65 +0,0 @@
-{
-  "module": "openapi_first.cli",
-  "content": {
-    "path": "openapi_first.cli",
-    "docstring": "Command-line interface for FastAPI OpenAPI-first scaffolding utilities.\n\n---\n\n## Summary\n\nThis CLI bootstraps OpenAPI-first FastAPI applications from versioned,\nbundled templates packaged with the library.",
-    "objects": {
-      "argparse": {
-        "name": "argparse",
-        "kind": "alias",
-        "path": "openapi_first.cli.argparse",
-        "signature": "<bound method Alias.signature of Alias('argparse', 'argparse')>",
-        "docstring": null
-      },
-      "shutil": {
-        "name": "shutil",
-        "kind": "alias",
-        "path": "openapi_first.cli.shutil",
-        "signature": "<bound method Alias.signature of Alias('shutil', 'shutil')>",
-        "docstring": null
-      },
-      "resources": {
-        "name": "resources",
-        "kind": "alias",
-        "path": "openapi_first.cli.resources",
-        "signature": "<bound method Alias.signature of Alias('resources', 'importlib.resources')>",
-        "docstring": null
-      },
-      "Path": {
-        "name": "Path",
-        "kind": "alias",
-        "path": "openapi_first.cli.Path",
-        "signature": "<bound method Alias.signature of Alias('Path', 'pathlib.Path')>",
-        "docstring": null
-      },
-      "DEFAULT_TEMPLATE": {
-        "name": "DEFAULT_TEMPLATE",
-        "kind": "attribute",
-        "path": "openapi_first.cli.DEFAULT_TEMPLATE",
-        "signature": null,
-        "docstring": null
-      },
-      "available_templates": {
-        "name": "available_templates",
-        "kind": "function",
-        "path": "openapi_first.cli.available_templates",
-        "signature": "<bound method Function.signature of Function('available_templates', 20, 33)>",
-        "docstring": "Return a list of available application templates.\n\nReturns:\n    list[str]:\n        Sorted list of template names found in the internal templates directory."
-      },
-      "copy_template": {
-        "name": "copy_template",
-        "kind": "function",
-        "path": "openapi_first.cli.copy_template",
-        "signature": "<bound method Function.signature of Function('copy_template', 36, 64)>",
-        "docstring": "Copy a bundled OpenAPI-first application template into a directory.\n\nArgs:\n    template (str):\n        Name of the template to copy.\n    target_dir (Path):\n        Filesystem path where the template should be copied.\n\nRaises:\n    FileNotFoundError:\n        If the requested template does not exist."
-      },
-      "main": {
-        "name": "main",
-        "kind": "function",
-        "path": "openapi_first.cli.main",
-        "signature": "<bound method Function.signature of Function('main', 67, 196)>",
-        "docstring": null
-      }
-    }
-  }
-}