chore(registry): remove the Checkout Flow component

Owner-directed removal of the checkout-flow catalog item: source,
demo, generated docs page and payload, and its entries in the registry
manifest, catalog index, docs nav, and search vectors. The deletions
are allowlisted in check-no-main-deletions.

Author: miguel-heygen

docs/catalog/components/checkout-flow.mdx

@@ -625,7 +625,6 @@
                   "catalog/components/beat-timeline",
                   "catalog/components/before-after-wipe",
                   "catalog/components/camera-rig-depth-stack",
-                  "catalog/components/checkout-flow",
                   "catalog/components/comparison-split",
                   "catalog/components/confetti",
                   "catalog/components/cut-the-curve",

docs/docs.json

@@ -746,19 +746,6 @@
     "href": "/catalog/blocks/chatgpt-exchange",
     "preview": "https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/chatgpt-exchange.png"
   },
-  {
-    "name": "checkout-flow",
-    "type": "component",
-    "title": "Checkout Flow",
-    "description": "A composed checkout flow with plan summary, payment field rows, total, and purchase action",
-    "tags": [
-      "ui-flow",
-      "checkout",
-      "commerce"
-    ],
-    "href": "/catalog/components/checkout-flow",
-    "preview": "https://static.heygen.ai/hyperframes-oss/docs/images/catalog/components/checkout-flow.png"
-  },
   {
     "name": "chromatic-aberration-wipe",
     "type": "component",

docs/public/catalog-index.json

@@ -2,7 +2,7 @@
   "model": "bge-small-en-v1.5",
   "modelRevision": "ea104dacec62c0de699686887e3f920caeb4f3e3",
   "dimensions": 384,
-  "revision": "032078c10ac211b74a29a4826f113876ee4ef14c3e4cf9f935b0ec763cdca97f",
+  "revision": "fbf1facc93a2cd1dc4507407f21fe4f6097da56670aaab4a0689b12dc0c43d09",
   "names": [
     "ai-chat-reveal",
     "animated-bar-chart",
@@ -54,7 +54,6 @@
     "chat-message",
     "chat-thread",
     "chatgpt-exchange",
-    "checkout-flow",
     "chromatic-aberration-wipe",
     "chromatic-radial-split",
     "cinematic-zoom",