Add Autosend node with Mail and Contact resources

Implement n8n node for Autosend API with support for:
- Mail resource: Send single and bulk emails with template or custom content
- Contact resource: Create/update contacts (upsert) and get contacts by ID or email
- API key authentication
- Declarative routing following n8n best practices
- Full TypeScript support with proper typing
- Passing all linting checks

nodes/Autosend/resources/contact/get.ts

@@ -0,0 +1,80 @@
+import type { INodeProperties } from 'n8n-workflow';
+
+export const getOperation: INodeProperties[] = [
+	{
+		displayName: 'Search By',
+		name: 'searchBy',
+		type: 'options',
+		required: true,
+		default: 'email',
+		options: [
+			{
+				name: 'Email',
+				value: 'email',
+				description: 'Search contact by email address',
+			},
+			{
+				name: 'ID',
+				value: 'id',
+				description: 'Search contact by ID',
+			},
+		],
+		displayOptions: {
+			show: {
+				resource: ['contact'],
+				operation: ['get'],
+			},
+		},
+		description: 'How to search for the contact',
+	},
+	{
+		displayName: 'Contact ID',
+		name: 'contactId',
+		type: 'string',
+		required: true,
+		default: '',
+		displayOptions: {
+			show: {
+				resource: ['contact'],
+				operation: ['get'],
+				searchBy: ['id'],
+			},
+		},
+		routing: {
+			request: {
+				url: '=/contacts/{{$parameter.contactId}}',
+			},
+		},
+		description: 'The ID of the contact to retrieve',
+	},
+	{
+		displayName: 'Email',
+		name: 'email',
+		type: 'string',
+		required: true,
+		placeholder: 'contact@example.com',
+		default: '',
+		displayOptions: {
+			show: {
+				resource: ['contact'],
+				operation: ['get'],
+				searchBy: ['email'],
+			},
+		},
+		routing: {
+			send: {
+				type: 'body',
+				property: 'emails',
+				preSend: [
+					async function (this, requestOptions) {
+						const email = this.getNodeParameter('email') as string;
+						requestOptions.body = requestOptions.body || {};
+						(requestOptions.body as Record<string, unknown>).emails = [email];
+						return requestOptions;
+					},
+				],
+			},
+		},
+		description: 'The email address of the contact to search for',
+	},
+];