Implement device management (#199)

- Added `tt::hal::Device` and functions (de)register devices and search for them.
- Refactored apps: `Power` and `Display` settings apps now use the device API to find devices.
- Implemented the new API for all existing drivers for all devices, including the simulator.
- Updated HAL Configuration to return `std::shared_ptr` instead of raw pointers.
- Added test project for headless tests and implemented tests for the new code.

Boards/LilygoTdeck/Source/hal/TdeckKeyboard.cpp

@@ -62,6 +62,6 @@ bool TdeckKeyboard::isAttached() const {
     return tt::hal::i2c::masterHasDeviceAtAddress(TDECK_KEYBOARD_I2C_BUS_HANDLE, TDECK_KEYBOARD_SLAVE_ADDRESS, 100);
 }
 
-tt::hal::Keyboard* createKeyboard() {
-    return dynamic_cast<tt::hal::Keyboard*>(new TdeckKeyboard());
+std::shared_ptr<tt::hal::Keyboard> createKeyboard() {
+    return std::make_shared<TdeckKeyboard>();
 }