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/clear-payload/simple/csharp.cs

@@ -0,0 +1,11 @@
+using Qdrant.Client;
+
+public class Snippet
+{
+	public static async Task Run()
+	{
+		var client = new QdrantClient("localhost", 6334);
+
+		await client.ClearPayloadAsync(collectionName: "{collection_name}", ids: new ulong[] { 0, 3, 100 });
+	}
+}

qdrant-landing/content/documentation/headless/snippets/clear-payload/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
     .clearPayloadAsync("{collection_name}", List.of(id(0), id(3), id(100)), true, null, null)
     .get();

qdrant-landing/content/documentation/headless/snippets/clear-payload/simple/go.go

@@ -0,0 +1,16 @@
+package snippet
+
+import (
+    "context"
+
+    "github.com/qdrant/go-client/qdrant"
+)
+
+func Main() {
+	client.ClearPayload(context.Background(), &qdrant.ClearPayloadPoints{
+	    CollectionName: "{collection_name}",
+	    Points: qdrant.NewPointsSelector(
+	        qdrant.NewIDNum(0),
+	        qdrant.NewIDNum(3)),
+	})
+}

qdrant-landing/content/documentation/headless/snippets/clear-payload/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
+                    .clearPayloadAsync("{collection_name}", List.of(id(0), id(3), id(100)), true, null, null)
+                    .get();
+        }
+}

qdrant-landing/content/documentation/headless/snippets/clear-payload/simple/python.py

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

qdrant-landing/content/documentation/headless/snippets/clear-payload/simple/rust.rs

@@ -0,0 +1,15 @@
+use qdrant_client::qdrant::{ClearPayloadPointsBuilder, PointsIdsList};
+
+pub async fn main() -> anyhow::Result<()> {
+    client
+        .clear_payload(
+            ClearPayloadPointsBuilder::new("{collection_name}")
+                .points(PointsIdsList {
+                    ids: vec![0.into(), 3.into(), 10.into()],
+                })
+                .wait(true),
+        )
+        .await?;
+
+    Ok(())
+}

qdrant-landing/content/documentation/headless/snippets/clear-payload/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.clearPayload("{collection_name}", {
+  points: [0, 3, 100],
+});