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/delete-payload/by-point-id/csharp.cs

@@ -0,0 +1,15 @@
+using Qdrant.Client;
+
+public class Snippet
+{
+	public static async Task Run()
+	{
+		var client = new QdrantClient("localhost", 6334);
+
+		await client.DeletePayloadAsync(
+		    collectionName: "{collection_name}",
+		    keys: ["color", "price"],
+		    ids: new ulong[] { 0, 3, 100 }
+		);
+	}
+}

qdrant-landing/content/documentation/headless/snippets/delete-payload/by-point-id/generated/java.md

@@ -1,8 +1,8 @@
 ```java
-import java.util.List;
-
 import static io.qdrant.client.PointIdFactory.id;
 
+import java.util.List;
+
 client
     .deletePayloadAsync(
         "{collection_name}",

qdrant-landing/content/documentation/headless/snippets/delete-payload/by-point-id/go.go

@@ -0,0 +1,22 @@
+package snippet
+
+import (
+    "context"
+
+    "github.com/qdrant/go-client/qdrant"
+)
+
+func Main() {
+	client, err := qdrant.NewClient(&qdrant.Config{
+	    Host: "localhost",
+	    Port: 6334,
+	})
+
+	client.DeletePayload(context.Background(), &qdrant.DeletePayloadPoints{
+	    CollectionName: "{collection_name}",
+	    Keys:           []string{"color", "price"},
+	    PointsSelector: qdrant.NewPointsSelector(
+	        qdrant.NewIDNum(0),
+	        qdrant.NewIDNum(3)),
+	})
+}

qdrant-landing/content/documentation/headless/snippets/delete-payload/by-point-id/java.java

@@ -0,0 +1,19 @@
+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
+                    .deletePayloadAsync(
+                        "{collection_name}",
+                        List.of("color", "price"),
+                        List.of(id(0), id(3), id(100)),
+                        true,
+                        null,
+                        null)
+                    .get();
+        }
+}

qdrant-landing/content/documentation/headless/snippets/delete-payload/by-point-id/python.py

@@ -0,0 +1,9 @@
+from qdrant_client import QdrantClient  # @hide
+
+client = QdrantClient(url="http://localhost:6333")  # @hide
+
+client.delete_payload(
+    collection_name="{collection_name}",
+    keys=["color", "price"],
+    points=[0, 3, 100],
+)

qdrant-landing/content/documentation/headless/snippets/delete-payload/by-point-id/rust.rs

@@ -0,0 +1,18 @@
+use qdrant_client::qdrant::{DeletePayloadPointsBuilder, PointsIdsList};
+
+pub async fn main() -> anyhow::Result<()> {
+    client
+        .delete_payload(
+            DeletePayloadPointsBuilder::new(
+                "{collection_name}",
+                vec!["color".to_string(), "price".to_string()],
+            )
+            .points_selector(PointsIdsList {
+                ids: vec![0.into(), 3.into(), 10.into()],
+            })
+            .wait(true),
+        )
+        .await?;
+
+    Ok(())
+}

qdrant-landing/content/documentation/headless/snippets/delete-payload/by-point-id/typescript.ts

@@ -0,0 +1,8 @@
+import { QdrantClient } from "@qdrant/js-client-rest"; // @hide
+
+const client = new QdrantClient({ host: "localhost", port: 6333 }); // @hide
+
+client.deletePayload("{collection_name}", {
+  keys: ["color", "price"],
+  points: [0, 3, 100],
+});