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/distance-matrix/offsets-format/csharp.cs

@@ -0,0 +1,18 @@
+using Qdrant.Client;
+using Qdrant.Client.Grpc;
+using static Qdrant.Client.Grpc.Conditions;
+
+public class Snippet
+{
+	public static async Task Run()
+	{
+		var client = new QdrantClient("localhost", 6334);
+
+		await client.SearchMatrixOffsetsAsync(
+		    collectionName: "{collection_name}",
+		    filter: MatchKeyword("color", "red"),
+		    sample: 10,
+		    limit: 2
+		);
+	}
+}

qdrant-landing/content/documentation/headless/snippets/distance-matrix/offsets-format/go.go

@@ -0,0 +1,27 @@
+package snippet
+
+import (
+    "context"
+
+    "github.com/qdrant/go-client/qdrant"
+)
+
+func Main() {
+	client, err := qdrant.NewClient(&qdrant.Config{
+	    Host: "localhost",
+	    Port: 6334,
+	})
+
+	sample := uint64(10)
+	limit := uint64(2)
+	res, err := client.SearchMatrixOffsets(ctx, &qdrant.SearchMatrixPoints{
+	    CollectionName: "{collection_name}",
+	    Sample:         &sample,
+	    Limit:          &limit,
+	    Filter: &qdrant.Filter{
+	        Must: []*qdrant.Condition{
+	            qdrant.NewMatch("color", "red"),
+	        },
+	    },
+	})
+}

qdrant-landing/content/documentation/headless/snippets/distance-matrix/offsets-format/java.java

@@ -0,0 +1,25 @@
+package com.example.snippets_amalgamation;
+
+import static io.qdrant.client.ConditionFactory.matchKeyword;
+
+import io.qdrant.client.QdrantClient;
+import io.qdrant.client.QdrantGrpcClient;
+import io.qdrant.client.grpc.Common.Filter;
+import io.qdrant.client.grpc.Points.SearchMatrixPoints;
+
+public class Snippet {
+        public static void run() throws Exception {
+                QdrantClient client =
+                    new QdrantClient(QdrantGrpcClient.newBuilder("localhost", 6334, false).build());
+
+                client
+                    .searchMatrixOffsetsAsync(
+                        SearchMatrixPoints.newBuilder()
+                            .setCollectionName("{collection_name}")
+                            .setFilter(Filter.newBuilder().addMust(matchKeyword("color", "red")).build())
+                            .setSample(10)
+                            .setLimit(2)
+                            .build())
+                    .get();
+        }
+}

qdrant-landing/content/documentation/headless/snippets/distance-matrix/offsets-format/python.py

@@ -0,0 +1,16 @@
+from qdrant_client import QdrantClient, models
+
+client = QdrantClient(url="http://localhost:6333")
+
+client.search_matrix_offsets(
+    collection_name="{collection_name}",
+    sample=10,
+    limit=2,
+    query_filter=models.Filter(
+        must=[
+            models.FieldCondition(
+                key="color", match=models.MatchValue(value="red")
+            ),
+        ]
+    ),
+)

qdrant-landing/content/documentation/headless/snippets/distance-matrix/offsets-format/rust.rs

@@ -0,0 +1,18 @@
+use qdrant_client::qdrant::{Condition, Filter, SearchMatrixPointsBuilder};
+use qdrant_client::Qdrant;
+
+pub async fn main() -> anyhow::Result<()> {
+    client
+        .search_matrix_offsets(
+            SearchMatrixPointsBuilder::new("collection_name")
+               .filter(Filter::must(vec![Condition::matches(
+                   "color",
+                   "red".to_string(),
+               )]))
+               .sample(10)
+               .limit(2),
+        )
+        .await?;
+
+    Ok(())
+}

qdrant-landing/content/documentation/headless/snippets/distance-matrix/offsets-format/typescript.ts

@@ -0,0 +1,18 @@
+import { QdrantClient } from "@qdrant/js-client-rest";
+
+const client = new QdrantClient({ host: "localhost", port: 6333 });
+
+client.searchMatrixOffsets("{collection_name}", {
+    filter: {
+        must: [
+            {
+                key: "color",
+                match: {
+                    value: "red",
+                },
+            },
+        ],
+    },
+    sample: 10,
+    limit: 2,
+});