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/collection-aliases/delete/generated/bash.md

@@ -0,0 +1,13 @@
+```bash
+curl -X POST http://localhost:6333/collections/aliases \
+  -H 'Content-Type: application/json' \
+  --data-raw '{
+    "actions": [
+        {
+            "delete_alias": {
+                "alias_name": "production_collection"
+            }
+        }
+    ]
+}'
+```

qdrant-landing/content/documentation/headless/snippets/collection-aliases/delete/generated/csharp.md

@@ -0,0 +1,3 @@
+```csharp
+await client.DeleteAliasAsync("production_collection");
+```

qdrant-landing/content/documentation/headless/snippets/collection-aliases/delete/generated/go.md

@@ -0,0 +1,5 @@
+```go
+import "context"
+
+client.DeleteAlias(context.Background(), "production_collection")
+```

qdrant-landing/content/documentation/headless/snippets/collection-aliases/delete/generated/java.md

@@ -0,0 +1,3 @@
+```java
+client.deleteAliasAsync("production_collection").get();
+```

qdrant-landing/content/documentation/headless/snippets/collection-aliases/delete/generated/python.md

@@ -0,0 +1,9 @@
+```python
+client.update_collection_aliases(
+    change_aliases_operations=[
+        models.DeleteAliasOperation(
+            delete_alias=models.DeleteAlias(alias_name="production_collection")
+        ),
+    ]
+)
+```

qdrant-landing/content/documentation/headless/snippets/collection-aliases/delete/generated/rust.md

@@ -0,0 +1,3 @@
+```rust
+client.delete_alias("production_collection").await?;
+```

qdrant-landing/content/documentation/headless/snippets/collection-aliases/delete/generated/typescript.md

@@ -0,0 +1,11 @@
+```typescript
+client.updateCollectionAliases({
+  actions: [
+    {
+      delete_alias: {
+        alias_name: "production_collection",
+      },
+    },
+  ],
+});
+```