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>

node_modules/vinyl/lib/is-stream.js

@@ -0,0 +1,15 @@
+'use strict';
+
+function isStream(stream) {
+  if (!stream) {
+    return false;
+  }
+
+  if (typeof stream.pipe !== 'function') {
+    return false;
+  }
+
+  return true;
+}
+
+module.exports = isStream;