feat(Qdrant Vector Store Node): Qdrant vector store support (#8080)

## Summary
This PR intends to add [Qdrant](https://qdrant.tech/) as a supported
vectorstore node to load and retrieve documents from in a workflow.


## Review / Merge checklist
- [x] PR title and summary are descriptive. 
- [x] Node/credentials documentation to be updated in
https://github.com/n8n-io/n8n-docs/pull/1796.

---------

Co-authored-by: oleg <me@olegivaniv.com>
Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/@n8n/nodes-langchain/credentials/QdrantApi.credentials.ts

@@ -0,0 +1,50 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class QdrantApi implements ICredentialType {
+	name = 'qdrantApi';
+
+	displayName = 'QdrantApi';
+
+	documentationUrl = 'https://docs.n8n.io/integrations/builtin/credentials/qdrant/';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+		{
+			displayName: 'Qdrant URL',
+			name: 'qdrantUrl',
+			type: 'string',
+			required: true,
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				'api-key': '={{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials.qdrantUrl}}',
+			headers: {
+				accept: 'application/json; charset=utf-8',
+			},
+		},
+	};
+}