✨ Add Apache Kafka node (#1109)

* ✨ Add Apache Kafka node

* ⚡ Improvements

Co-authored-by: Tanay Pant <tanaypant@protonmail.com>

packages/nodes-base/credentials/KafkaPlain.credentials.ts

@@ -0,0 +1,29 @@
+import {
+	ICredentialType,
+	NodePropertyTypes,
+} from 'n8n-workflow';
+
+export class KafkaPlain implements ICredentialType {
+	extends = [
+		'kafka',
+	];
+	name = 'kafkaPlain';
+	displayName = 'Kafka';
+	properties = [
+		{
+			displayName: 'Username',
+			name: 'username',
+			type: 'string' as NodePropertyTypes,
+			default: '',
+		},
+		{
+			displayName: 'Password',
+			name: 'password',
+			type: 'string' as NodePropertyTypes,
+			typeOptions: {
+				password: true,
+			},
+			default: '',
+		},
+	];
+}