feat(motorgo-plink): Add motorgo plink BSP compoenent

[finger563]

Description

This PR adds two new components:

1. bdc_driver: a reusable brushed DC motor driver component built on ESP-IDF MCPWM for dual-PWM / H-bridge style motor control.
2. motorgo-plink: a new BSP for the Every Flavor Robotics MotorGo Plink board.

The new espp::BdcDriver provides a generic two-output brushed motor interface with signed speed control, direct duty control, enable handling, and duty/raw-duty readback for debugging.

The new espp::MotorGoPlink BSP provides:

• four dual-PWM DC motor channels
• four MT6701 SSI encoder chip selects on a shared SPI bus
• four servo signal pins
• Qwiic and internal I2C buses
• onboard LSM6DS33 IMU access via the shared lsm6dso driver
• user and status LED control with out-of-phase breathing support

The Plink motor path now uses the new MCPWM-backed bdc_driver, which allows the onboard LEDs to continue pulsing while the motor outputs are active. This PR also includes the related README, Sphinx/Doxygen, CI, and component registry wiring for both new components.

Motivation and Context

This change adds first-class support for the MotorGo Plink hardware and factors its brushed motor control into a reusable component instead of keeping that logic BSP-specific.

It solves two problems:

1. there was no BSP for MotorGo Plink in ESPP
2. the board’s four dual-PWM motor channels are a better fit for MCPWM than LEDC, and moving them to MCPWM frees LEDC for the onboard indicator LEDs

The new bdc_driver also provides a reusable building block for future brushed DC motor boards and applications that use dual-PWM H-bridge drivers.

How has this been tested?

The changes were tested by building the new and updated examples with ESP-IDF on esp32s3:

• components/bdc_driver/example
• components/motorgo-plink/example

The MotorGo Plink example was also iterated to validate:

• motor initialization failure handling
• MCPWM-backed motor command logging
• stronger sweep behavior for visible motion
• concurrent LED breathing while motor control is enabled

Screenshots (if appropriate, e.g. schematic, board, console logs, lab pictures):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Hardware (schematic, board, system design) change
• Software change

Checklist:

• My change requires a change to the documentation.
• I have added / updated the documentation related to this change via either README or WIKI

Software

• I have added tests to cover my changes.
• I have updated the .github/workflows/build.yml file to add my new test to the automated cloud build github action.
• All new and existing tests passed.
• My code follows the code style of this project.

[github-actions]

✅Static analysis result - no issues found! ✅

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Pull request overview

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