Initial commit: n8n Strike API node

- Add Strike API credentials configuration
- Implement Strike node with 9 resources (Account, Balance, Currency Exchange, Deposit, Invoice, Payment, Payment Method, Payout, Rates)
- Add comprehensive operation descriptions for all resources
- Include CLAUDE.MD documentation
- Set up build configuration with TypeScript, ESLint, and Prettier

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

nodes/Strike/descriptions/BalanceDescription.ts

@@ -0,0 +1,26 @@
+import type { INodeProperties } from 'n8n-workflow';
+
+export const balanceOperations: INodeProperties[] = [
+	{
+		displayName: 'Operation',
+		name: 'operation',
+		type: 'options',
+		noDataExpression: true,
+		displayOptions: {
+			show: {
+				resource: ['balance'],
+			},
+		},
+		options: [
+			{
+				name: 'Get',
+				value: 'get',
+				description: 'Get account balances',
+				action: 'Get account balances',
+			},
+		],
+		default: 'get',
+	},
+];
+
+export const balanceFields: INodeProperties[] = [];