Summary

Adds explicit #include <Arduino.h> lines to the LPC .ino fixtures under tests/platform.

Why

The LPC build currently preprocesses sketches before the LPC8xx Arduino core include roots are available to the scanner. That means generated .ino.cpp files can miss Arduino.h, leaving fixture code unable to resolve Arduino symbols such as pinMode, digitalWrite, delay, HIGH, LOW, and OUTPUT.

Making the fixtures include Arduino.h directly keeps the tests independent of scanner-side header injection and unblocks the LPC board CI failures.

Validation

• git diff --check
• Verified all six LPC sketch fixtures include Arduino.h

Summary by CodeRabbit

• Tests
  • Resolved compilation failures across multiple platform test fixtures by ensuring required core library dependencies are properly included in test sketches.