feat: add Obsidian CLI API service

- Add Docker image for the official Obsidian desktop app and CLI.

- Start Obsidian headlessly with Xvfb and DBus setup.

- Expose a safe structured HTTP command API without shell execution.

- Add JWT-based vault, path, and command authorization.

- Support single-vault and multi-vault container mounts.

- Add TypeScript SDK helpers for Obsidian CLI commands.

- Add n8n community node package with Obsidian operations.

- Add docs, compose config, tests, and production image workflow.

packages/n8n-nodes-obsidian-api/credentials/ObsidianApi.credentials.ts

@@ -0,0 +1,40 @@
+import type {
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class ObsidianApi implements ICredentialType {
+	name = 'obsidianApi';
+	displayName = 'Obsidian API';
+	documentationUrl = 'https://git.yiprawr.dev/Docker/obsidian-api';
+	properties: INodeProperties[] = [
+		{
+			displayName: 'Base URL',
+			name: 'baseUrl',
+			type: 'string',
+			default: 'http://obsidian-api:8080',
+			placeholder: 'http://obsidian-api:8080',
+			description: 'Base URL of the Obsidian API Docker service',
+			required: true,
+		},
+		{
+			displayName: 'API Token',
+			name: 'apiToken',
+			type: 'string',
+			typeOptions: {
+				password: true,
+			},
+			default: '',
+			description: 'Bearer JWT created with scripts/create_jwt.py',
+			required: true,
+		},
+		{
+			displayName: 'Default Vault',
+			name: 'defaultVault',
+			type: 'string',
+			default: '',
+			placeholder: 'work',
+			description: 'Optional default vault name/path. Sent as vault=<value> before every command unless the node overrides it.',
+		},
+	];
+}