SPI HAL implemented and more (#207)

- Cleanup unused code and move ISR/IRQ checks to `Kernel.h`
- Improve clang-format
- Fix for LVGL lock transfer: ensure lock isn't activate when changing the lock
- Implement SPI HAL
- Remove `initHardware` HAL configuration entry
- Fix `I2cScanner`: don't scan when port isn't started

TactilityCore/Include/Tactility/kernel/Kernel.h

@@ -14,6 +14,13 @@ typedef enum {
     PlatformSimulator
 } Platform;
 
+/** Return true when called from an Interrupt Service Routine (~IRQ mode) */
+#ifdef ESP_PLATFORM
+inline constexpr bool isIsr() { return (xPortInIsrContext() == pdTRUE); }
+#else
+inline constexpr bool isIsr() { return false; }
+#endif
+
 /** Check if kernel is running
  * @return true if the FreeRTOS kernel is running, false otherwise
  */