feat(board): add support for MakerGO ESP32 C6 SuperMini

[epsilonrt]

Description of Change

This pull request adds support for the MakerGO ESP32 C6 SuperMini board to the Arduino-ESP32 core.

Changes include:

• Added board entry in boards.txt
• Created variants/makergo_c6_supermini with pin mapping

Test Scenarios

I have tested the following scenarios to verify the board support:

• Verified compilation and upload with Arduino IDE 2.3.6 and Espressif Arduino-ESP32 v3.3.4
• Tested basic examples successfully on the MakerGO ESP32 C6 SuperMini board

The following examples were compiled, uploaded, and executed successfully:

• Blink (Blue LED with digitalWrite)
• Blink RGB (WS2812 / RGB LED with rgbLedWrite)
• Serial CDC (USB communication)
• WiFi (WiFiClient example)
• Zigbee: Zigbee_On_Off_Light cluster tested successfully
• I2C master: control of OLED display SSD1306
• SPI master: Read/Write to SPI FRAM memory

[github-actions]

Warnings

⚠️

Some issues found for the commit messages in this PR: the commit message "Update variants/makergo_c6_supermini/pins_arduino.h ": summary looks empty type/action looks empty the commit message "Update variants/makergo_c6_supermini/pins_arduino.h": summary looks empty type/action looks empty Please fix these commit messages - here are some basic tips: follow Conventional Commits style correct format of commit message should be: <type/action>(<scope/component>): <summary>, for example fix(esp32): Fixed startup timeout issue allowed types are: change,ci,docs,feat,fix,refactor,remove,revert,test sufficiently descriptive message summary should be between 10 to 72 characters and start with upper case letter avoid Jira references in commit messages (unavailable/irrelevant for our customers) TIP: Install pre-commit hooks and run this check when committing (uses the Conventional Precommit Linter).

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[Copilot]

Pull request overview

This PR adds support for the MakerGO ESP32 C6 SuperMini board to the Arduino-ESP32 core, enabling users to develop applications for this compact ESP32-C6 based development board.

• Adds comprehensive board configuration including Zigbee support, multiple partition schemes, and flexible frequency options
• Defines pin mappings for all GPIO pins with support for RGB LED (WS2812), blue LED, serial, I2C, SPI, and analog interfaces
• Includes detailed ASCII art pinout diagram for easy reference

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
variants/makergo_c6_supermini/pins_arduino.h	Defines GPIO pin mappings, RGB LED configuration, peripheral assignments (UART, I2C, SPI), analog pins, and LP I2C pins for the MakerGO ESP32 C6 SuperMini board
boards.txt	Adds complete board configuration entry with build settings (RISC-V architecture, 160MHz CPU, 4MB flash), menu options for JTAG, CDC, partitions, CPU frequency, flash settings, upload speeds, debug levels, erase options, and Zigbee modes

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[P-R-O-C-H-Y]

Small nitpick only