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/retrieve-points/simple/csharp.cs

@@ -0,0 +1,16 @@
+using Qdrant.Client;
+
+public class Snippet
+{
+	public static async Task Run()
+	{
+		var client = new QdrantClient("localhost", 6334);
+
+		await client.RetrieveAsync(
+			collectionName: "{collection_name}",
+			ids: [0, 30, 100],
+			withPayload: false,
+			withVectors: false
+		);
+	}
+}

qdrant-landing/content/documentation/headless/snippets/retrieve-points/simple/generated/java.md

@@ -1,8 +1,8 @@
 ```java
-import java.util.List;
-
 import static io.qdrant.client.PointIdFactory.id;
 
+import java.util.List;
+
 client
     .retrieveAsync("{collection_name}", List.of(id(0), id(30), id(100)), false, false, null)
     .get();

qdrant-landing/content/documentation/headless/snippets/retrieve-points/simple/go.go

@@ -0,0 +1,21 @@
+package snippet
+
+import (
+	"context"
+
+	"github.com/qdrant/go-client/qdrant"
+)
+
+func Main() {
+	client, err := qdrant.NewClient(&qdrant.Config{
+		Host: "localhost",
+		Port: 6334,
+	})
+
+	client.Get(context.Background(), &qdrant.GetPoints{
+		CollectionName: "{collection_name}",
+		Ids: []*qdrant.PointId{
+			qdrant.NewIDNum(0), qdrant.NewIDNum(3), qdrant.NewIDNum(100),
+		},
+	})
+}

qdrant-landing/content/documentation/headless/snippets/retrieve-points/simple/java.java

@@ -0,0 +1,13 @@
+package com.example.snippets_amalgamation;
+
+import static io.qdrant.client.PointIdFactory.id;
+
+import java.util.List;
+
+public class Snippet {
+        public static void run() throws Exception {
+                client
+                    .retrieveAsync("{collection_name}", List.of(id(0), id(30), id(100)), false, false, null)
+                    .get();
+        }
+}

qdrant-landing/content/documentation/headless/snippets/retrieve-points/simple/python.py

@@ -0,0 +1,8 @@
+from qdrant_client import QdrantClient  # @hide
+
+client = QdrantClient(url="http://localhost:6333")  # @hide
+
+client.retrieve(
+    collection_name="{collection_name}",
+    ids=[0, 3, 100],
+)

qdrant-landing/content/documentation/headless/snippets/retrieve-points/simple/rust.rs

@@ -0,0 +1,12 @@
+use qdrant_client::qdrant::GetPointsBuilder;
+
+pub async fn main() -> anyhow::Result<()> {
+    client
+        .get_points(GetPointsBuilder::new(
+            "{collection_name}",
+            vec![0.into(), 30.into(), 100.into()],
+        ))
+        .await?;
+
+    Ok(())
+}

qdrant-landing/content/documentation/headless/snippets/retrieve-points/simple/typescript.ts

@@ -0,0 +1,7 @@
+import { QdrantClient } from "@qdrant/js-client-rest"; // @hide
+
+const client = new QdrantClient({ host: "localhost", port: 6333 }); // @hide
+
+client.retrieve("{collection_name}", {
+  ids: [0, 3, 100],
+});