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/snapshots/delete-collection-snapshot/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.DeleteSnapshotAsync(collectionName: "{collection_name}", snapshotName: "{snapshot_name}");
+	}
+}

qdrant-landing/content/documentation/headless/snippets/snapshots/delete-collection-snapshot/go.go

@@ -0,0 +1,16 @@
+package snippet
+
+import (
+	"context"
+
+	"github.com/qdrant/go-client/qdrant"
+)
+
+func Main() {
+	client, err := qdrant.NewClient(&qdrant.Config{
+		Host: "localhost",
+		Port: 6334,
+	})
+
+	client.DeleteSnapshot(context.Background(), "{collection_name}", "{snapshot_name}")
+}

qdrant-landing/content/documentation/headless/snippets/snapshots/delete-collection-snapshot/java.java

@@ -0,0 +1,13 @@
+package com.example.snippets_amalgamation;
+
+import io.qdrant.client.QdrantClient;
+import io.qdrant.client.QdrantGrpcClient;
+
+public class Snippet {
+        public static void run() throws Exception {
+                QdrantClient client =
+                    new QdrantClient(QdrantGrpcClient.newBuilder("localhost", 6334, false).build());
+
+                client.deleteSnapshotAsync("{collection_name}", "{snapshot_name}").get();
+        }
+}

qdrant-landing/content/documentation/headless/snippets/snapshots/delete-collection-snapshot/python.py

@@ -0,0 +1,7 @@
+from qdrant_client import QdrantClient
+
+client = QdrantClient(url="http://localhost:6333")
+
+client.delete_snapshot(
+    collection_name="{collection_name}", snapshot_name="{snapshot_name}"
+)

qdrant-landing/content/documentation/headless/snippets/snapshots/delete-collection-snapshot/rust.rs

@@ -0,0 +1,15 @@
+use qdrant_client::qdrant::DeleteSnapshotRequestBuilder;
+use qdrant_client::Qdrant;
+
+pub async fn main() -> anyhow::Result<()> {
+    let client = Qdrant::from_url("http://localhost:6334").build()?;
+
+    client
+        .delete_snapshot(DeleteSnapshotRequestBuilder::new(
+            "{collection_name}",
+            "{snapshot_name}",
+        ))
+        .await?;
+
+    Ok(())
+}

qdrant-landing/content/documentation/headless/snippets/snapshots/delete-collection-snapshot/typescript.ts

@@ -0,0 +1,5 @@
+import { QdrantClient } from "@qdrant/js-client-rest";
+
+const client = new QdrantClient({ host: "localhost", port: 6333 });
+
+client.deleteSnapshot("{collection_name}", "{snapshot_name}");