feat: Azure Open AI chat model & embeddings (#8522)

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>

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

@@ -0,0 +1,43 @@
+import type { IAuthenticateGeneric, ICredentialType, INodeProperties } from 'n8n-workflow';
+
+export class AzureOpenAiApi implements ICredentialType {
+	name = 'azureOpenAiApi';
+
+	displayName = 'Azure Open AI';
+
+	documentationUrl = 'azureopenai';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+		{
+			displayName: 'Resource Name',
+			name: 'resourceName',
+			type: 'string',
+			required: true,
+			default: '',
+		},
+		{
+			displayName: 'API Version',
+			name: 'apiVersion',
+			type: 'string',
+			required: true,
+			default: '2023-05-15',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				'api-key': '={{$credentials.apiKey}}',
+			},
+		},
+	};
+}