Document new strict_mode_config parameters (v1.18.0) (#2303)

* Document 7 missing strict_mode_config parameters

Adds documentation sections and code snippets (Python, TypeScript, Rust,
Go, Java, C#, HTTP, bash) for search_allow_exact, search_max_hnsw_ef,
search_max_oversampling, search_max_batchsize, max_resident_memory_percent,
multivector_config, and sparse_config.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Use title case for all headers

* Update qdrant-landing/content/documentation/ops-configuration/administration.md

Co-authored-by: Tim Visée <tim@visee.me>

* Mention default strict mode on Cloud; Clarify behavior of only setting enabled=true

* Apply suggestion from @timvisee

Co-authored-by: Tim Visée <tim@visee.me>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Tim Visée <tim@visee.me>

qdrant-landing/content/documentation/headless/snippets/strict-mode/search-max-hnsw-ef/go.go

@@ -0,0 +1,24 @@
+package snippet
+
+import (
+  "context"
+
+  "github.com/qdrant/go-client/qdrant"
+)
+
+func Main() {
+	client, err := qdrant.NewClient(&qdrant.Config{
+	  Host: "localhost",
+	  Port: 6334,
+	})
+
+	if err != nil { panic(err) } // @hide
+
+	client.CreateCollection(context.Background(), &qdrant.CreateCollection{
+	  CollectionName: "{collection_name}",
+	  StrictModeConfig: &qdrant.StrictModeConfig{
+	    Enabled: qdrant.PtrOf(true),
+	    SearchMaxHnswEf: qdrant.PtrOf(uint32(128)),
+	  },
+	})
+}