Automated snippet conversion by scripts

These changes are purely mechanical to differentiate them from manual
fixes/adjustments made in the next commit.
This results in broken code as some snippets contain errors.

Made in four steps:
1. Run ./migrate-snippet.py that converts `.md` files to code files
   and perhaps adds missing lines under `// @hide` comments.
2. Sort Java imports.
3. Remove old `.md` files.
4. Run ./generate.md to produce `*/generated/*.md` files.

qdrant-landing/content/documentation/headless/snippets/create-collection/with-metadata/generated/bash.md

@@ -0,0 +1,14 @@
+```bash
+curl -X PUT http://localhost:6333/collections/{collection_name} \
+  -H 'Content-Type: application/json' \
+  --data-raw '{
+    "vectors": {
+      "size": 300,
+      "distance": "Cosine"
+    },
+    "metadata": {
+      "my-metadata-field": "value-1",
+      "another-field": 123
+    }
+  }'
+```

qdrant-landing/content/documentation/headless/snippets/create-collection/with-metadata/generated/csharp.md

@@ -0,0 +1,16 @@
+```csharp
+using Qdrant.Client;
+using Qdrant.Client.Grpc;
+
+var client = new QdrantClient("localhost", 6334);
+
+await client.CreateCollectionAsync(
+	collectionName: "{collection_name}",
+	vectorsConfig: new VectorParams { Size = 100, Distance = Distance.Cosine },
+	metadata: new()
+	{
+		["my-metadata-field"] = "value-1",
+		["another-field"] = 123
+	}
+);
+```

qdrant-landing/content/documentation/headless/snippets/create-collection/with-metadata/generated/go.md

@@ -0,0 +1,24 @@
+```go
+import (
+	"context"
+
+	"github.com/qdrant/go-client/qdrant"
+)
+
+client, err := qdrant.NewClient(&qdrant.Config{
+	Host: "localhost",
+	Port: 6334,
+})
+
+client.CreateCollection(context.Background(), &qdrant.CreateCollection{
+	CollectionName: "{collection_name}",
+	VectorsConfig: qdrant.NewVectorsConfig(&qdrant.VectorParams{
+		Size:     100,
+		Distance: qdrant.Distance_Cosine,
+	}),
+	Metadata: qdrant.NewValueMap(map[string]any{
+		"my-metadata-field": "value-1",
+		"another-field":     123,
+	}),
+})
+```

qdrant-landing/content/documentation/headless/snippets/create-collection/with-metadata/generated/java.md

@@ -0,0 +1,33 @@
+```java
+import static io.qdrant.client.ValueFactory.value;
+
+import io.qdrant.client.QdrantClient;
+import io.qdrant.client.QdrantGrpcClient;
+import io.qdrant.client.grpc.Collections.CreateCollection;
+import io.qdrant.client.grpc.Collections.Distance;
+import io.qdrant.client.grpc.Collections.VectorParams;
+import io.qdrant.client.grpc.Collections.VectorsConfig;
+import java.util.Map;
+
+QdrantClient client = new QdrantClient(
+    QdrantGrpcClient.newBuilder("localhost", 6334, false).build());
+
+client
+    .createCollectionAsync(
+        CreateCollection.newBuilder()
+            .setCollectionName("{collection_name}")
+            .setVectorsConfig(
+                VectorsConfig.newBuilder()
+                    .setParams(
+                        VectorParams.newBuilder()
+                            .setDistance(Distance.Cosine)
+                            .setSize(100)
+                            .build())
+                    .build())
+            .putAllMetadata(
+                Map.of(
+                    "my-metadata-field", value("value-1"),
+                    "another-field", value(123)))
+            .build())
+    .get();
+```

qdrant-landing/content/documentation/headless/snippets/create-collection/with-metadata/generated/python.md

@@ -0,0 +1,13 @@
+```python
+from qdrant_client import QdrantClient, models
+
+client = QdrantClient(url="http://localhost:6333")
+
+client.create_collection(
+    collection_name="{collection_name}",
+    metadata={
+        "my-metadata-field": "value-1",
+        "another-field": 123
+    },
+)
+```

qdrant-landing/content/documentation/headless/snippets/create-collection/with-metadata/generated/rust.md

@@ -0,0 +1,20 @@
+```rust
+use qdrant_client::qdrant::{CreateCollectionBuilder, Distance, VectorParamsBuilder};
+use qdrant_client::Qdrant;
+use serde_json::{json, Value};
+use std::collections::HashMap;
+
+let client = Qdrant::from_url("http://localhost:6334").build()?;
+
+let mut metadata: HashMap<String, Value> = HashMap::new();
+metadata.insert("my-metadata-field".to_string(), json!("value-1"));
+metadata.insert("another-field".to_string(), json!(123));
+
+client
+    .create_collection(
+        CreateCollectionBuilder::new("{collection_name}")
+            .vectors_config(VectorParamsBuilder::new(100, Distance::Cosine))
+            .metadata(metadata),
+    )
+    .await?;
+```

qdrant-landing/content/documentation/headless/snippets/create-collection/with-metadata/generated/typescript.md

@@ -0,0 +1,13 @@
+```typescript
+import { QdrantClient } from "@qdrant/js-client-rest";
+
+const client = new QdrantClient({ host: "localhost", port: 6333 });
+
+client.createCollection("{collection_name}", {
+  vectors: { size: 100, distance: "Cosine" },
+  metadata: {
+    "my-metadata-field": "value-1",
+    "another-field": 123
+  }
+});
+```