Partial reimplementation of TactilityC GPIO

[KenVanHoeylandt]

Summary by CodeRabbit

• New Features
  • Added a GPIO hardware abstraction layer for reading pin levels from applications.
  • Applications can now query the number of available GPIO pins so they can adapt to different devices.
• Chores
  • Integrations updated so GPIO capabilities are discoverable and exported to running applications.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Adds GPIO pin-count and level functionality across layers. Introduces tt_hal_gpio.h and tt_hal_gpio.cpp with C APIs tt_hal_gpio_get_level and tt_hal_gpio_get_pin_count. Extends GpioControllerApi with get_pin_count and adds gpio_controller_get_pin_count plus GPIO_CONTROLLER_TYPE. Implements get_pin_count in the ESP32 GPIO driver and sets its deviceType. Exports the new HAL symbols in tt_init.cpp. Updates CMake to add TactilityKernel as a private dependency.

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 11.11% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Partial reimplementation of TactilityC GPIO' accurately describes the main objective of the changeset, which adds GPIO HAL interface implementations across multiple files.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch partial-reimplement-tactilityc-gpio

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[coderabbitai]

Actionable comments posted: 4

🧹 Nitpick comments (1)

TactilityC/Include/tt_hal_gpio.h (1)

10-13: Make GPIO_NO_PIN type-safe for unsigned GpioPin.

♻️ Suggested tweak

-#define GPIO_NO_PIN -1
+#define GPIO_NO_PIN ((GpioPin)-1)