feat: Initial structure for Suno AI n8n node

I've set up the foundational boilerplate for the Suno AI integration.

Key changes include:
- Restructured directories for nodes, credentials, interfaces, utils, tests, and docs.
- Renamed and updated example files to Suno-specific names and conventions (SunoApi.credentials.ts, Suno.node.ts).
- Updated package.json and root README.md for the Suno AI node.
- Created .env.example with placeholders for Suno environment variables.
- Added a dev-log.md with initial notes on authentication research strategy.
- Scaffolded utils/sunoApi.ts with placeholder API functions and JSDoc comments.
- Scaffolded nodes/Suno/Suno.node.ts with operations, properties, execute routing, and a placeholder SVG icon.
- Scaffolded nodes/Suno/SunoTrigger.node.ts with a basic trigger structure and properties.
- Defined initial TypeScript types in interfaces/SunoTypes.ts for common data structures (SunoTrack, SunoJob, etc.).
- Created placeholder README.md files in new subdirectories.

This commit establishes the project structure and lays the groundwork for implementing Suno AI API interactions and node functionality.

credentials/ExampleCredentialsApi.credentials.ts

@@ -1,59 +0,0 @@
-import {
-	IAuthenticateGeneric,
-	ICredentialTestRequest,
-	ICredentialType,
-	INodeProperties,
-} from 'n8n-workflow';
-
-export class ExampleCredentialsApi implements ICredentialType {
-	name = 'exampleCredentialsApi';
-	displayName = 'Example Credentials API';
-
-	documentationUrl = 'https://your-docs-url';
-
-	properties: INodeProperties[] = [
-		// The credentials to get from user and save encrypted.
-		// Properties can be defined exactly in the same way
-		// as node properties.
-		{
-			displayName: 'User Name',
-			name: 'username',
-			type: 'string',
-			default: '',
-		},
-		{
-			displayName: 'Password',
-			name: 'password',
-			type: 'string',
-			typeOptions: {
-				password: true,
-			},
-			default: '',
-		},
-	];
-
-	// This credential is currently not used by any node directly
-	// but the HTTP Request node can use it to make requests.
-	// The credential is also testable due to the `test` property below
-	authenticate: IAuthenticateGeneric = {
-		type: 'generic',
-		properties: {
-			auth: {
-				username: '={{ $credentials.username }}',
-				password: '={{ $credentials.password }}',
-			},
-			qs: {
-				// Send this as part of the query string
-				n8n: 'rocks',
-			},
-		},
-	};
-
-	// The block below tells how this credential can be tested
-	test: ICredentialTestRequest = {
-		request: {
-			baseURL: 'https://example.com/',
-			url: '',
-		},
-	};
-}