[Doc] Reduce browser memory usage for docs (#3870)

Signed-off-by: David Chen <530634352@qq.com>

docs/mkdocs/hooks/search_index.py

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""Reduce browser search-index memory for generated API reference pages."""
+
+from material.plugins.search.plugin import SearchIndex
+
+_add_entry_from_context = SearchIndex.add_entry_from_context
+
+
+def add_entry_from_context(self: SearchIndex, page) -> None:
+    search = page.meta.get("search") or {}
+    if search.get("exclude"):
+        return
+
+    if str(page.url).startswith("api/"):
+        entry = {
+            "location": page.url,
+            "title": str(page.meta.get("title", page.title)),
+            "text": "",
+        }
+        if "boost" in search:
+            entry["boost"] = search["boost"]
+        self.entries.append(entry)
+        return
+
+    _add_entry_from_context(self, page)
+
+
+SearchIndex.add_entry_from_context = add_entry_from_context