TEST: Clean board to demonstrate validation CI

[mattytrentini]

Summary

Temporary PR to demonstrate a clean board validation result. All required files are present, all fields are valid.

Expected result: Pass with only one warning (missing media image, which is expected for any new board).

Test plan

• Workflow triggers and passes
• PR comment shows clean result with only the expected media image warning

[github-actions]

Code size report:

Reference:  tools: Fix micropython-media image path in board validation. [5edd0bf]
Comparison: rp2/boards/TEST_CLEAN_BOARD: Add clean dummy board for CI testing. [merge of 19a1689]
  mpy-cross:    +0 +0.000% 
   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:    +0 +0.000% standard
      stm32:    +0 +0.000% PYBV10
      esp32:    +0 +0.000% ESP32_GENERIC
     mimxrt:    +0 +0.000% TEENSY40
        rp2:    +0 +0.000% RPI_PICO_W
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS
  qemu rv32:    +0 +0.000% VIRT_RV32

[github-actions]

Code size report:

Reference:  github/workflows: Use explicit PR number and add debug logging for comments. [66c298c]
Comparison: rp2/boards/TEST_CLEAN_BOARD: Add clean dummy board for CI testing. [merge of 7df0358]
  mpy-cross:    +0 +0.000% 
   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:    +0 +0.000% standard
      stm32:    +0 +0.000% PYBV10
      esp32:    +0 +0.000% ESP32_GENERIC
     mimxrt:    +0 +0.000% TEENSY40
        rp2:    +0 +0.000% RPI_PICO_W
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS
  qemu rv32:    +0 +0.000% VIRT_RV32

[github-actions]

Code size report:

Reference:  tools: Make URL liveness check a notice instead of a warning. [414fad2]
Comparison: rp2/boards/TEST_CLEAN_BOARD: Add clean dummy board for CI testing. [merge of e385335]
  mpy-cross:    +0 +0.000% 
   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:    +0 +0.000% standard
      stm32:    +0 +0.000% PYBV10
      esp32:    +0 +0.000% ESP32_GENERIC
     mimxrt:    +0 +0.000% TEENSY40
        rp2:    +0 +0.000% RPI_PICO_W
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS
  qemu rv32:    +0 +0.000% VIRT_RV32

[github-actions]

ℹ️ Notice: URL 'https://www.raspberrypi.com/products/raspberry-pi-pico/' returned HTTP 403.

[github-actions]

ℹ️ Notice: Image(s) not found in micropython-media repository: rp2-pico.jpg. Please submit a corresponding PR to https://github.com/micropython/micropython-media with board images.