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>

credentials/StrikeApi.credentials.ts

@@ -0,0 +1,56 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class StrikeApi implements ICredentialType {
+	name = 'strikeApi';
+	displayName = 'Strike API';
+	documentationUrl = 'https://docs.strike.me/api/';
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			default: '',
+			required: true,
+			description: 'Your Strike API key from the Strike Dashboard',
+		},
+		{
+			displayName: 'Environment',
+			name: 'environment',
+			type: 'options',
+			options: [
+				{
+					name: 'Production',
+					value: 'production',
+				},
+				{
+					name: 'Sandbox',
+					value: 'sandbox',
+				},
+			],
+			default: 'production',
+			description: 'Select the Strike API environment',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Authorization: '={{"Bearer " + $credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials.environment === "sandbox" ? "https://api.strike.me" : "https://api.strike.me"}}',
+			url: '/v1/balances',
+		},
+	};
+}